how long should paragraphs be in a research paper

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Organizing Your Social Sciences Research Paper

• Paragraph Development
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A paragraph is a group of related sentences that support one main idea. In general, paragraphs consist of three parts: the topic sentence, body sentences, and the concluding or the bridge sentence to the next paragraph or section of the paper. Paragraphs show where the subdivisions of a research paper begin and end and, thus, help the reader see the organization of the essay and grasp its main points in relation to the research problem.

Arnaudet, Martin L. and Mary Ellen Barrett. Paragraph Development: A Guide for Students of English . 2nd edition. Englewood Cliffs, NJ: Prentice Hall Regents, 1990; Rahman, Mohidur. “The Essentials of Paragraph Writing to Develop Writing Skill.” Global Journal of Human Social Science: Linguistics and Education 22 (2022).

Importance of Constructing Good Paragraphs

Paragraphs are the building blocks of papers . Without well-written paragraphs that flow logically from one idea to the next and that inform and help support understanding of the research problem being investigated, your paper will not be viewed as credible by the reader. More than simply a collection of sentences, a paragraph must possess a controlling idea [i.e., the thinking strategy, opinion, or attitude that provides a framework from which to interpret the author’s position concerning the research problem]. The paragraph should then explain the idea in a structurally coherent way and be sufficiently developed to inform the reader about that idea in a way that transitions naturally into the next paragraph or section of your paper.

Below are common problems with developing effective paragraphs:

1.  The paragraph has no controlling idea . Imagine each paragraph as having three general layers of text. The core content is in the middle. It includes all the evidence you need to make the point. However, this evidence needs to be introduced by a topic sentence or your readers will not know what to do with all the evidence you have given them. Therefore, the beginning of the paragraph explains the controlling idea of the paragraph. The last part of the paragraph tells the reader how the paragraph relates to the broader argument and provides a transition to the next idea. Once you have mastered the use of topic sentences, you may decide that the topic sentence for a particular paragraph really should not be the first sentence of the paragraph. This is fine—the topic sentence can actually go at the beginning, middle, or end of a paragraph; what is important is that it is there to inform readers what the main idea of the paragraph is and how it relates back to the broader topic of your paper.

2.  The paragraph has more than one controlling idea . This is the most common reason why a paragraph is too lengthy. If a paragraph is more than a page long, it likely contains more than one controlling idea. In this case, consider eliminating sentences that relate to the second idea, with the thought that these statements do not inform and help support the research problem, or if this information is important, split the paragraph into two or more paragraphs, each with only one controlling idea.

3.  Transitional statement is missing . In academic writing, most paragraphs include a transition from one paragraph to the next paragraph because research writing often addresses complex and multilayered topics that require in-depth explanations and analysis. T he transition ensures that there is a logical sequence of thoughts, ideas, and arguments within y our paper. A transitional statement can be one or two sentences that helps establish relationships between controlling ideas and create a logical progression of those ideas throughout the paper. Transitions are especially important at the end of paragraphs that discuss multiple examples, explain complex issues or concepts, or at the end of each section of your paper [e.g., introduction to literature review].

Arnaudet, Martin L. and Mary Ellen Barrett. Paragraph Development: A Guide for Students of English . 2nd edition. Englewood Cliffs, NJ: Prentice Hall Regents, 1990; Paragraph Development: Importance of Constructing Good Paragraphs. AP English Literature and Composition. Edublogs, 2012; Paragraphing. Centre for Applied Linguistics. University of Warwick; Hicks, Rodney W. “Tips for New and Experienced Authors: Focus on the Paragraph.” Journal of the American Association of Nurse Practitioners 32 (October 2020): 639-641.

Structure and Writing Style

I.  General Structure

Most paragraphs in an essay parallel the general three-part structure of each section of a research paper and, by extension, the overall research paper, with an introduction, a body that includes facts and analysis, and a conclusion. You can see this structure in paragraphs whether they are narrating, describing, comparing, contrasting, or analyzing information. Each part of the paragraph plays an important role in communicating the meaning you intend to covey to the reader.

Introduction : the first section of a paragraph; should include the topic sentence and any other sentences at the beginning of the paragraph that give background information or provide a transition.

Body : follows the introduction; discusses the controlling idea, using facts, arguments, analysis, examples, and other information.

Conclusion : the final section; summarizes the connections between the information discussed in the body of the paragraph and the paragraph’s controlling idea. For long paragraphs, you may also want to include a bridge sentence that introduces the next paragraph or section of the paper. In some instances, the bridge sentence can be written in the form of a question. However, use this rhetorical device sparingly, otherwise, ending a lot of paragraphs with a question to lead into the next paragraph sounds cumbersome.

NOTE:   This general structure does not imply that you should not be creative in your writing. Arranging where each element goes in a paragraph can make a paper more engaging for the reader. However, do not be too creative in experimenting with the narrative flow of paragraphs. To do so may distract from the main arguments of your research and weaken the quality of your academic writing.

II.  Development and Organization

Before you can begin to determine what the composition of a particular paragraph will be, you must consider what is the most important idea that you are trying to convey to your reader. This is the "controlling idea," or the thesis statement from which you compose the remainder of the paragraph. In other words, your paragraphs should remind your reader that there is a recurrent relationship between your controlling idea and the information in each paragraph. The research problem functions like a seed from which your paper, and your ideas, will grow. The whole process of paragraph development is an organic one—a natural progression from a seed idea to a full-blown research study where there are direct, familial relationships in the paper between all of  your controlling ideas and the paragraphs which derive from them. The decision about what to put into your paragraphs begins with brainstorming about how you want to pursue the research problem . There are many techniques for brainstorming but, whichever one you choose, this stage of paragraph development cannot be skipped because it lays a foundation for developing a set of paragraphs [representing a section of your paper] that describes a specific element of your overall analysis. Each section is described further in this writing guide. Given these factors, every paragraph in a paper should be :

• Unified —All of the sentences in a single paragraph should be related to a single controlling idea [often expressed in the topic sentence of the paragraph].
• Clearly related to the research problem —The sentences should all refer to the central idea, or the thesis, of the paper.
• Coherent —The sentences should be arranged in a logical manner and should follow a definite plan for development.
• Well-developed —Every idea discussed in the paragraph should be adequately explained and supported through evidence and details that work together to explain the paragraph's controlling idea.

There are many different ways you can organize a paragraph . However, the organization you choose will depend on the controlling idea of the paragraph. Ways to organize a paragraph in academic writing include:

• Narrative : Tell a story. Go chronologically, from start to finish.
• Descriptive : Provide specific details about what something looks or feels like. Organize spatially, in order of appearance, or by topic.
• Process : Explain step by step how something works. Perhaps follow a sequence—first, second, third.
• Classification : Separate into groups or explain the various parts of a topic.
• Illustrative : Give examples and explain how those examples prove your point.

Arnaudet, Martin L. and Mary Ellen Barrett. Paragraph Development: A Guide for Students of English . 2nd edition. Englewood Cliffs, NJ: Prentice Hall Regents, 1990; On Paragraphs. The Writing Lab and The OWL. Purdue University; Organization: General Guidelines for Paragraphing. The Reading/Writing Center. Hunter College; The Paragraph. The Writing Center. Pasadena City College; Paragraph Structure. Effective Writing Center. University of Maryland; Paragraphs. Institute for Writing Rhetoric. Dartmouth College; Paragraphs. The Writing Center. University of North Carolina; Paragraphs. University Writing Center. Texas A&M University; Paragraphs and Topic Sentences. Writing Tutorial Services, Center for Innovative Teaching and Learning. Indiana University; Weissberg, Robert C. “Given and New: Paragraph Development Models from Scientific English.” TESOL Quarterly 18 (September 1984): 485-500.

Writing Tip

Coherence of Ideas is What Matters, Not Length!

Do not think of developing paragraphs in terms of their length. Length and appearance do not determine whether a part in your paper is a paragraph. It is the unity and coherence of ideas represented in a sentence or among sentences that constitutes to a good paragraph.

Bahl, Vik. Paragraph Development. English 127 Research Writing syllabus. Green River Community College.

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What this handout is about

This handout will help you understand how paragraphs are formed, how to develop stronger paragraphs, and how to completely and clearly express your ideas.

What is a paragraph?

Paragraphs are the building blocks of papers. Many students define paragraphs in terms of length: a paragraph is a group of at least five sentences, a paragraph is half a page long, etc. In reality, though, the unity and coherence of ideas among sentences is what constitutes a paragraph. A paragraph is defined as “a group of sentences or a single sentence that forms a unit” (Lunsford and Connors 116). Length and appearance do not determine whether a section in a paper is a paragraph. For instance, in some styles of writing, particularly journalistic styles, a paragraph can be just one sentence long. Ultimately, a paragraph is a sentence or group of sentences that support one main idea. In this handout, we will refer to this as the “controlling idea,” because it controls what happens in the rest of the paragraph.

How do I decide what to put in a paragraph?

Before you can begin to determine what the composition of a particular paragraph will be, you must first decide on an argument and a working thesis statement for your paper. What is the most important idea that you are trying to convey to your reader? The information in each paragraph must be related to that idea. In other words, your paragraphs should remind your reader that there is a recurrent relationship between your thesis and the information in each paragraph. A working thesis functions like a seed from which your paper, and your ideas, will grow. The whole process is an organic one—a natural progression from a seed to a full-blown paper where there are direct, familial relationships between all of the ideas in the paper.

The decision about what to put into your paragraphs begins with the germination of a seed of ideas; this “germination process” is better known as brainstorming . There are many techniques for brainstorming; whichever one you choose, this stage of paragraph development cannot be skipped. Building paragraphs can be like building a skyscraper: there must be a well-planned foundation that supports what you are building. Any cracks, inconsistencies, or other corruptions of the foundation can cause your whole paper to crumble.

So, let’s suppose that you have done some brainstorming to develop your thesis. What else should you keep in mind as you begin to create paragraphs? Every paragraph in a paper should be :

• Unified : All of the sentences in a single paragraph should be related to a single controlling idea (often expressed in the topic sentence of the paragraph).
• Clearly related to the thesis : The sentences should all refer to the central idea, or thesis, of the paper (Rosen and Behrens 119).
• Coherent : The sentences should be arranged in a logical manner and should follow a definite plan for development (Rosen and Behrens 119).
• Well-developed : Every idea discussed in the paragraph should be adequately explained and supported through evidence and details that work together to explain the paragraph’s controlling idea (Rosen and Behrens 119).

How do I organize a paragraph?

There are many different ways to organize a paragraph. The organization you choose will depend on the controlling idea of the paragraph. Below are a few possibilities for organization, with links to brief examples:

• Narration : Tell a story. Go chronologically, from start to finish. ( See an example. )
• Description : Provide specific details about what something looks, smells, tastes, sounds, or feels like. Organize spatially, in order of appearance, or by topic. ( See an example. )
• Process : Explain how something works, step by step. Perhaps follow a sequence—first, second, third. ( See an example. )
• Classification : Separate into groups or explain the various parts of a topic. ( See an example. )
• Illustration : Give examples and explain how those examples support your point. (See an example in the 5-step process below.)

Illustration paragraph: a 5-step example

From the list above, let’s choose “illustration” as our rhetorical purpose. We’ll walk through a 5-step process for building a paragraph that illustrates a point in an argument. For each step there is an explanation and example. Our example paragraph will be about human misconceptions of piranhas.

Step 1. Decide on a controlling idea and create a topic sentence

Paragraph development begins with the formulation of the controlling idea. This idea directs the paragraph’s development. Often, the controlling idea of a paragraph will appear in the form of a topic sentence. In some cases, you may need more than one sentence to express a paragraph’s controlling idea.

Controlling idea and topic sentence — Despite the fact that piranhas are relatively harmless, many people continue to believe the pervasive myth that piranhas are dangerous to humans.

Step 2. Elaborate on the controlling idea

Paragraph development continues with an elaboration on the controlling idea, perhaps with an explanation, implication, or statement about significance. Our example offers a possible explanation for the pervasiveness of the myth.

Elaboration — This impression of piranhas is exacerbated by their mischaracterization in popular media.

Step 3. Give an example (or multiple examples)

Paragraph development progresses with an example (or more) that illustrates the claims made in the previous sentences.

Example — For example, the promotional poster for the 1978 horror film Piranha features an oversized piranha poised to bite the leg of an unsuspecting woman.

Step 4. Explain the example(s)

The next movement in paragraph development is an explanation of each example and its relevance to the topic sentence. The explanation should demonstrate the value of the example as evidence to support the major claim, or focus, in your paragraph.

Continue the pattern of giving examples and explaining them until all points/examples that the writer deems necessary have been made and explained. NONE of your examples should be left unexplained. You might be able to explain the relationship between the example and the topic sentence in the same sentence which introduced the example. More often, however, you will need to explain that relationship in a separate sentence.

Explanation for example — Such a terrifying representation easily captures the imagination and promotes unnecessary fear.

Notice that the example and explanation steps of this 5-step process (steps 3 and 4) can be repeated as needed. The idea is that you continue to use this pattern until you have completely developed the main idea of the paragraph.

Step 5. Complete the paragraph’s idea or transition into the next paragraph

The final movement in paragraph development involves tying up the loose ends of the paragraph. At this point, you can remind your reader about the relevance of the information to the larger paper, or you can make a concluding point for this example. You might, however, simply transition to the next paragraph.

Sentences for completing a paragraph — While the trope of the man-eating piranhas lends excitement to the adventure stories, it bears little resemblance to the real-life piranha. By paying more attention to fact than fiction, humans may finally be able to let go of this inaccurate belief.

Finished paragraph

Despite the fact that piranhas are relatively harmless, many people continue to believe the pervasive myth that piranhas are dangerous to humans. This impression of piranhas is exacerbated by their mischaracterization in popular media. For example, the promotional poster for the 1978 horror film Piranha features an oversized piranha poised to bite the leg of an unsuspecting woman. Such a terrifying representation easily captures the imagination and promotes unnecessary fear. While the trope of the man-eating piranhas lends excitement to the adventure stories, it bears little resemblance to the real-life piranha. By paying more attention to fact than fiction, humans may finally be able to let go of this inaccurate belief.

Troubleshooting paragraphs

Problem: the paragraph has no topic sentence.

Imagine each paragraph as a sandwich. The real content of the sandwich—the meat or other filling—is in the middle. It includes all the evidence you need to make the point. But it gets kind of messy to eat a sandwich without any bread. Your readers don’t know what to do with all the evidence you’ve given them. So, the top slice of bread (the first sentence of the paragraph) explains the topic (or controlling idea) of the paragraph. And, the bottom slice (the last sentence of the paragraph) tells the reader how the paragraph relates to the broader argument. In the original and revised paragraphs below, notice how a topic sentence expressing the controlling idea tells the reader the point of all the evidence.

Original paragraph

Piranhas rarely feed on large animals; they eat smaller fish and aquatic plants. When confronted with humans, piranhas’ first instinct is to flee, not attack. Their fear of humans makes sense. Far more piranhas are eaten by people than people are eaten by piranhas. If the fish are well-fed, they won’t bite humans.

Revised paragraph

Although most people consider piranhas to be quite dangerous, they are, for the most part, entirely harmless. Piranhas rarely feed on large animals; they eat smaller fish and aquatic plants. When confronted with humans, piranhas’ first instinct is to flee, not attack. Their fear of humans makes sense. Far more piranhas are eaten by people than people are eaten by piranhas. If the fish are well-fed, they won’t bite humans.

Once you have mastered the use of topic sentences, you may decide that the topic sentence for a particular paragraph really shouldn’t be the first sentence of the paragraph. This is fine—the topic sentence can actually go at the beginning, middle, or end of a paragraph; what’s important is that it is in there somewhere so that readers know what the main idea of the paragraph is and how it relates back to the thesis of your paper. Suppose that we wanted to start the piranha paragraph with a transition sentence—something that reminds the reader of what happened in the previous paragraph—rather than with the topic sentence. Let’s suppose that the previous paragraph was about all kinds of animals that people are afraid of, like sharks, snakes, and spiders. Our paragraph might look like this (the topic sentence is bold):

Like sharks, snakes, and spiders, piranhas are widely feared. Although most people consider piranhas to be quite dangerous, they are, for the most part, entirely harmless . Piranhas rarely feed on large animals; they eat smaller fish and aquatic plants. When confronted with humans, piranhas’ first instinct is to flee, not attack. Their fear of humans makes sense. Far more piranhas are eaten by people than people are eaten by piranhas. If the fish are well-fed, they won’t bite humans.

Problem: the paragraph has more than one controlling idea

If a paragraph has more than one main idea, consider eliminating sentences that relate to the second idea, or split the paragraph into two or more paragraphs, each with only one main idea. Watch our short video on reverse outlining to learn a quick way to test whether your paragraphs are unified. In the following paragraph, the final two sentences branch off into a different topic; so, the revised paragraph eliminates them and concludes with a sentence that reminds the reader of the paragraph’s main idea.

Although most people consider piranhas to be quite dangerous, they are, for the most part, entirely harmless. Piranhas rarely feed on large animals; they eat smaller fish and aquatic plants. When confronted with humans, piranhas’ first instinct is to flee, not attack. Their fear of humans makes sense. Far more piranhas are eaten by people than people are eaten by piranhas. A number of South American groups eat piranhas. They fry or grill the fish and then serve them with coconut milk or tucupi, a sauce made from fermented manioc juices.

Problem: transitions are needed within the paragraph

You are probably familiar with the idea that transitions may be needed between paragraphs or sections in a paper (see our handout on transitions ). Sometimes they are also helpful within the body of a single paragraph. Within a paragraph, transitions are often single words or short phrases that help to establish relationships between ideas and to create a logical progression of those ideas in a paragraph. This is especially likely to be true within paragraphs that discuss multiple examples. Let’s take a look at a version of our piranha paragraph that uses transitions to orient the reader:

Although most people consider piranhas to be quite dangerous, they are, except in two main situations, entirely harmless. Piranhas rarely feed on large animals; they eat smaller fish and aquatic plants. When confronted with humans, piranhas’ instinct is to flee, not attack. But there are two situations in which a piranha bite is likely. The first is when a frightened piranha is lifted out of the water—for example, if it has been caught in a fishing net. The second is when the water level in pools where piranhas are living falls too low. A large number of fish may be trapped in a single pool, and if they are hungry, they may attack anything that enters the water.

In this example, you can see how the phrases “the first” and “the second” help the reader follow the organization of the ideas in the paragraph.

Works consulted

We consulted these works while writing this handout. This is not a comprehensive list of resources on the handout’s topic, and we encourage you to do your own research to find additional publications. Please do not use this list as a model for the format of your own reference list, as it may not match the citation style you are using. For guidance on formatting citations, please see the UNC Libraries citation tutorial . We revise these tips periodically and welcome feedback.

Lunsford, Andrea. 2008. The St. Martin’s Handbook: Annotated Instructor’s Edition , 6th ed. New York: St. Martin’s.

Rosen, Leonard J., and Laurence Behrens. 2003. The Allyn & Bacon Handbook , 5th ed. New York: Longman.

You may reproduce it for non-commercial use if you use the entire handout and attribute the source: The Writing Center, University of North Carolina at Chapel Hill

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Paragraphing (Length Consistency)

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Paragraphs are units of thought with one adequately developed idea. Listed here are some rules of thumb to use when paragraphing. As your writing improves, you'll be able to break these "rules" to meet your own needs. Until then, these suggestions can be helpful.

• Put only one main idea per paragraph.
• Aim for three to five or more sentences per paragraph.
• Include on each page about two handwritten or three typed paragraphs.
• Make your paragraphs proportional to your paper. Since paragraphs do less work in short papers, have short paragraphs for short papers and longer paragraphs for longer papers.
• If you have a few very short paragraphs, think about whether they are really parts of a larger paragraph—and can be combined—or whether you can add details to support each point and thus make each into a more fully developed paragraph.

You can check on whether your paragraphs are balanced by looking at your paper.

Some balanced pages:

Paragraph Balance

Unbalanced pages with ideas not equally developed:

Unbalanced Paragraphs

Use the following graphics as a tool to organize your paper with one main idea in each box. Use as many pages and boxes as needed.

Graphics to Help with Balance and Organization

How to Write a Paragraph for Your Scientific Paper

This blog post has all you need to know about writing scientific paragraphs: You’ll learn the optimal research paper paragraph structure, how long a paragraph in a scientific paper should be, and how to write a good topic sentence (yes, I’ll show you some good scientific paragraph examples).

Publishing a well-written scientific research paper goes beyond being proficient in English. What’s more important is being able to write clear and well-structured scientific papers — especially if you want to get published in high-impact journals and get cited consistently.

One of the most important structural units of a scientific paper is the paragraph. Yet, most researchers don’t know how to write science paragraphs to create a well-structured scientific paper that every reader would find a pleasure to read.

In this blog post, I’ll answer the following questions about writing science paragraphs:

• How long should a paragraph be in a research paper?
• What is the topic sentence and what is the concluding sentence in a science paragraph?
• What is the best research paper paragraph structure?

Okay, let’s go:  

The most common problem with scientific paragraphs I see is that they are too long. Often this is because authors are covering more than one topic per paragraph (see section “What is the best research paper paragraph structure?” below). The problem with long science paragraphs is that they are hard to read, especially if the author meanders through several different topics without the main message of the scientific paragraph being clear.

Don’t be afraid of short and concise paragraphs! A length of 100-200 words for a science paragraph is optimal. If your paragraphs tend to be longer, I suggest analysing them to see how you could divide them up sensibly.

WHAT IS THE TOPIC SENTENCE AND WHAT IS THE CONCLUDING SENTENCE IN A SCIENCE PARAGRAPH?

The first and last sentences, called topic and concluding sentences, respectively, are the strongest positions of a science paragraph. Even when people only skim-read your scientific paper, they tend to pay a more attention at the beginning and the end of structural units such as sections, subsections, and paragraphs. In fact, I often catch myself only reading the first sentence of a paragraph to decide whether it’s worth reading the whole paragraph or whether I want to skip to the next one. Therefore, it is wise to make use of the first and last positions in science paragraphs. Let me show you how below.

EXAMPLES OF TOPIC SENTENCES IN SCIENCE PARAGRAPHS

In the first sentence, it is crucial to signal to the reader what the paragraph will be about. One way to do this is to provide a topic sentence, which summarises the content of the paragraph.

Here is a scientific paragraph example of a well-crafted topic sentence:

There are a number of clear advantages in extending the spectral range of SPAD detectors into the short-wave infrared region […].” Firstly, compatibility with the optical fibre low-loss telecommunications windows is a fundamental advantage in many fibre-based applications. Secondly, [….] Thirdly, […] Finally, operation in the SWIR will mean enhanced atmospheric transmission, especially through obscurants such as smoke, smog, fog and haze. Vines et al., Nature Communications 10, 1086 (2019).

Here, the first sentence (“There are a number of clear advantages in extending the spectral range of SPAS detectors into the short-wave infrared region”), the topic sentence, states that there are many advantages for modifying the model system. The paragraphs then continues listing these advantages (“firstly, …”, “secondly,…”, “thirdly,…”, “finally,…”).

In science paragraph writing, it’s often advisable to present the conclusion at the beginning of the paragraph, in the topic sentence, instead of in the concluding sentence. This prepares the reader for what is to follow without them having to keep a lot of information in their head before being presented with the conclusion. This means your writing will be clearer to them and it will be less effort to read your scientific paragraphs — always a good thing!

Here’s another scientific paragraph example that demonstrates stating the conclusion in the topic sentence:

The measured DCR demonstrates a vast improvement when compared to previous Ge-on-Si work. Warburton et al. reported […] There is a similar relationship when our results are compared to results from Martinez et al., who reported […] This considerable reduction in DCR has resulted from […] In order to fully ascertain the relative contributions to DCR, we are initiating a series of measurements on samples with different diameters and Ge thicknesses. Vines et al., Nature Communications 10, 1086 (2019).

Here, the topic sentence (“The measured DCR demonstrates a vast improvement when compared to previous Ge-on-Si work”) presents the main conclusion. In the following sentences, the authors go into detail about the evidence supporting this conclusion and offer interpretations. The last sentence (“In order to fully ascertain the relative contributions to DCR, we are initiating a series of measurement on samples with different diameters and Ge thicknesses”) — technically the concluding sentence — describes the next step, an outlook of future experiments to be performed.

Using both topic and concluding sentences when writing science paragraphs

In some parts of your paper it will make sense to use both a topic and a concluding sentence in your scientific paragraph. For example, you might describe the idea or purpose behind an experiment in the topic sentence. The science paragraph would continue to outline the methodology and results of the experiment. The concluding sentence would then present the conclusion or interpretation of the results of the experiment.

Here is an example of using both topic and concluding sentences in science paragraph writing:

The subjects learned stimulus-outcome relationships that required the formation of conjunctive representations. Our task was based on […] The task stimuli consisted of […] We used […]. AB and C predicted the target 70% of the time and B and AC predicted the target 30% of the time. […] Optimal performance required learning the value of stimuli as distinct conjunctions of features (i.e., conjunctive representations). Ballard et al., Nature Communications 10, 1073 (2019).

Here, the topic sentence (“The subjects learned stimulus-outcome relationships that required the formation of conjunctive representations”) describes what the experiment is about. A quick note from me: I think this topic sentence could be slightly improved by adding what the purpose of the experiment was. The science paragraph continues to give more details on the approach, methodology and results of the experiment. And, as suggested above, the concluding sentence in this scientific paragraph example (“Optimal performance required learning the value of stimuli as distinct conjunctions of features…”) communicates the conclusion of the performed experiment.

Let’s look at another science paragraph example of using both a topic and a concluding sentence:

To assess the possible impact on Bmp signalling, we analysed phospho-Smad159 (p-Smad159) localisation. […] Thus, higher levels of p-Smad159 cannot simply be explained due to increased expression of Bmp ligands. Senft et al., Nature Communications 10, 1089 (2019).

Here, the authors clearly state the purpose and approach of their experiment in the topic sentence (“To assess the possible impact on Bmp signalling, we analysed phospho-Smad159 localisation.”). Accordingly, the concluding sentence communicates the take-home message of the performed experiment (“Thus, higher levels of p-Smad159 cannot simply be explained due to increased expression of Bmp ligands.”).

What is the best Research paper paragraph structure?

Communicate one main message per paragraph.

I talk a lot about how important it is for a scientific paper to communicate a single main message . The same holds true for their building blocks – i.e., the science paragraphs. A paragraph should make sense on its own and communicate a clear message distinct from other paragraphs in your paper. If you are not able to summarise the content of a scientific paragraph you’ve written with a few keywords or in one simple sentence, the main message of your paragraph is unclear. This may be because you are covering two or more topics too different from each other in one paragraph, or because you need to add some information on how the topics are connected.

connect your paragraphs to create flow in the whole section of your scientific paper

Writing science paragraphs that communicate a single main message and have good topic and concluding sentences (see section “What is the topic sentence and what is the concluding sentence in a science paragraph?” above) isn’t enough. The paragraphs in your scientific paper also need to be connected with each other. Otherwise you’ve merely perfected completely distinct structural units. And that’s not what we want because in order to make your scientific paper easy to read, you need to create flow . Flow means that your reader will be able to go from one piece of information to the next one without ever getting stuck, wondering how things are connected.

On a paragraph level, you can achieve flow by relating back to information that was previously communicated in the topic sentence. Similarly, you can use the concluding sentence of a paragraph as a bridge to link to the topic sentence of the next paragraph.

Outline your paragraphs before you start writing your scientific paper

And one last tip: You’ll be writing your scientific paper more efficiently, if you plan out all paragraphs before you start typing out full sentences! Having a clear outline of your science paragraphs means that you only have to fill in the gaps. Dividing up a big task (e.g., “write an Introduction section”) into smaller tasks (e.g., “write one paragraph about topic X”) helps you overcome procrastination. You’ll still save time in the whole paper writing process even if you realise in the writing stage that you need to slightly adapt your outline. Finally, planning out your paragraphs beforehand will make it much easier to write a concise story that flows well.

Science paragraphs – 5 tips:

Okay, let’s recap my 5 top tips for writing scientific paragraphs:

• The optimal length of a scientific paragraph is 100-200 words
• Make good use of the strong positions of the topic and concluding sentences
• Communicate one clear message in each science paragraph
• Connect your paragraphs with each other to achieve a coherent paragraph structure in your research paper
• Outline your science paragraphs before your start writing

Good luck with your science paragraph writing!

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How Long Should a Research Paper Be?

How Long Should A Research Paper Be? An Overview

In short, research paper's average length can range from 1,500 words for research proposals and case studies - all the way to 100,000 words for large dissertations.

Research, by its nature of being complex, requires a careful and thorough elucidation of facts, notions, information, and the like - which is all reflected in its most optimal length.

Thus, one of the critical points that you need to focus on when writing either a complex research paper or a less complex research paper is your objective and how you can relay the latter in a particular context. Say you are writing a book review. Since you will only need to synthesize information from other sources to solidify your claim about a certain topic, you will perhaps use paraphrasing techniques, which offer a relatively lower word count when compared to a full-blown descriptive research paper.

Even when both types of research differ in word counts, they can effectively attain their objectives, given the different contexts in which they are written and constructed. 

Certainly, when asked about how long is a research paper, it surely depends on the objective or the type of research you will be using. Carrying out these objectives will warrant you to do certain paper writing tasks and techniques that are not necessarily long or short when you compare them to other research types. 

At Studyfy, we care for the attainment of your research objectives. We understand that achieving such will contribute to the success of your research completion. While maintaining the ideal word count for a research paper, you are in a meaningful position to understand the various elements that can enrich your paper, even if it looks overwhelming.

How Long Should the Introduction of a Research Paper Be?

The research introduction section most likely occupies approximately 30-40% of the entire research paper.

The introduction of a regular academic paper can total 1750-2000 words depending on the research type and complexity of the research niche or topic. That is why, in writing this section, you must enrich the content of your paper while maintaining readability and coherence for the benefit of your readers.

The introduction houses the background of the study. This is the part of the paper where the entire context of the paper is established. We all know that the research context is important as it helps the readers understand why the paper is even conducted in the first place. Thus, the impression of having a well-established context can only be found in the introduction. Now that we know the gravity of creating a good introduction, let us now ask how long this section should be.

Generally speaking, the paper’s introduction is the longest among all the sections. Aside from establishing the context, the introduction must house the historical underpinnings of the study (important for case studies and ethnographic research), salient information about all the variables in the study (including their relationship with other variables), and related literature and studies that can provide insight into the novelty and peculiarities of the current research project.

To better understand the general composition of your research introduction, you may refer to the breakdown of this section below:

• Context Establishment and Introduction of Key Terms. In this subsection, you will articulate the background (historical, social, economic, psychological, etc.) of the study, including the ecosystem and the niche of your study interest. Furthermore, key terms found as variables in your study must be properly defined operationally and theoretically, if necessary. This comprises 20% of the introduction, or about 350-500 words.
• Related Literature and Studies. This is the subsection where you will criticize and integrate existing literature and studies to highlight the research gap that you intend to fill in. This comprises 25% of the introduction or about 450-600 words.
• Thesis statement. This part of the introduction can only be a paragraph or a couple of sentences, as this needs to be straightforward in relaying the identified research gap of the researchers. This comprises 5% of the introduction or about 90-100 words.
• Objectives or Research Questions. This subsection should outline the aims of the study, especially highlighting the inquiries that concern the relationship between the variables and how the research will progress to fill in the identified gaps. This comprises 5% of the introduction or about 90-100 words.

Theoretical and/or Conceptual Framework. These frameworks, when better assisted with a visual representation, guide the entire research process and provide a structure for understanding the relationship between the variables in the study. This comprises 10% of the introduction or about 180-200 words.

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Elements of Good Research Writing Process– While Maintaining the Ideal Word Count!

• Clarity of Purpose . All types of writing, whether long or short, have its clarity of purpose as the heart of the text. In research, it is manifested through the inclusion of a research question or hypothesis. A good research paper does not repeat these elements without a purpose in mind. Though they can be emphasized throughout the development of the paper, the manner of doing it must be in a logical and purposeful way. 

To guide you in writing process of doing so, you can ask yourself the following questions:

• Is the research question or hypothesis clearly stated?
• Does the introduction provide a clear overview of the purpose of the study?
• Does the purpose of the study repeat purposefully in the latter sections of the paper?
• Does the purpose of the study repeat logically in the latter sections of the paper?

2. Literature Review . When appending related literature and studies to your paper, the question must not revolve around whether you have supplied a lot of these pieces of information, making your article wordy and ideal. While the literature review adds a significant ‘chunk’ to your paper, with some paper formats even allotting a specific section for it, we must carefully consider what and how we can integrate them. It subsequently entails a critical analysis of a piece of literature or study and logically places it beside information that you desire to contest. As they say, a good literature review identifies knowledge gaps, highlights the author’s familiarity with the topic, and provides an overview of the research areas that show a disparity of agreement. In order to have these characteristics, you can ask yourself the following questions:

• Have I integrated relevant literature in my review?
• Have I placed it logically within a specific piece of information based on my presumption?
• Do they identify a concept or piece of information that is otherwise unknown to the field?
• Have I critically analyzed existing research to identify the research gap?

3. Logical Flow. Research will not be whole without its parts. Researchers must know how to tie everything together and ensure that each part is functional in itself and supplements with other parts. When dealing with a large body of text, the logical flow of the paper might be a considerable concern. Along with the confusion brought about by the wordiness and complexity of the topic, your readers might get lost because of incoherence and inconsistencies with the presentation of ideas, leading to them not reading your paper any further. Thus, while ensuring that you get the word count that you want, you might want to ask yourself these questions first:

• Does the introduction progress logically from the general background to the specific research question?
• Do the transition devices between sections and individual paragraphs of the body facilitate a smooth flow of ideas?
• Is there a clear hierarchy of ideas, with each paragraph contributing to the overall argument?
• Have I organized ideas in a way that makes the document easy to track?
• Have I pursued a logical sequence of presenting information?

4. Language Use and Style. Developing an academic language throughout your paper and maintaining a formal style of paper writing are all the more important in research writing process, and mind you, it can also help you increase your word count in a sustainable way! Incorporating this form of language and style into your paper entails more than just adding incoherent or overly manufactured words that may be viewed as fillers.

Strategies and known practices are said to hit multiple objectives without compromising the quality of the paper. You may expand your points by providing detailed explanations, introducing sufficient pieces of evidence that supports your claims, addressing counterargument through the presentation of related literature or studies, or clarifying complex concepts through chunking. To better understand these techniques, some of these questions might be helpful for you:

• Is the language clear and concise?
• Have I avoided unnecessary jargon or complex sentences or paragraphs?
• Have I avoided repetition or redundancy in the document?
• Have I expanded on key points by providing more detailed explanations and examples?
• Have I discussed nuances, variations, or exceptions to your results?
• Have I clarified some complex concepts or theories by chunking them into more detailed explanations?

How Long Should a Paragraph Be in a Research Paper?

For the research paper introduction section, a typical paragraph count will be 12-15, excluding the literature review section. Each subsection has 1-2 individual paragraphs. The mentioned section, on the other hand, can have paragraphs totaling 10-20. The conclusion section, on the other hand, is considered ideal if it has 5-7 paragraphs. 

The paragraph count differs from one research type to another and even from one paper section to another. While it is worth deciding how long should a paragraph be in a research paper, it is more important to take note of the importance of ideas that should be included in each paragraph within a certain section. Take the review of the literature section as an example. The number of literature in the paper is said to be equal to the number of paragraphs allotted for the section. The reason lies in the uniformity of importance these pieces of literature hold, provided that they are closely associated with the research gap. 

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How Long Should a Conclusion Be in a Research Paper?

A concluding section, then, must only comprise 5% of the total word count of the paper, translating to approximately 400 words. This measly allocation may put you into a flimsy situation, especially if you do not know how to manage your vocabulary well and you keep on adding filler words that can sacrifice the importance of this section. Ditch the nonsense and construct your conclusion in a concise yet enriching way.

In concluding a research paper, it is important to always synthesize the big chunks of information examined in the data analysis and discussion. As worn out as the reader may look after reaching this point, the conclusion must act as a “mellow point” for them, entrusting them only with important pointers of the study. Sometimes, the conclusion part of the paper, even though less wordy than its preceding sections, may be difficult to construct, as you still need to have a basis– a scaffold– to refer to, and synthesizing, just like analyzing and evaluating data, is just as hard and laborious.

Through its superb essay writing services , plus applying top-notch quality assurance to academic papers like research articles, Studyfy can help you achieve the best for last with an effective, meaningful, and content-rich conclusion. Your readers will not think twice about using your study as a model for their own works!

How Long is a Research Paper in terms of its Various Types?

As mentioned in the first part of the article, the word count of an academic paper is dependent on the type of research you wish to conduct. While the general word count has been given, we cannot deny the fact that this threshold is only an estimation. There might be a time when you are tasked to create a research article that is different from a standard IMRAD-structured (Introduction, Methodology, Results, Analysis, Discussion) research paper. You are in for a treat, as we will provide you with a cheat sheet for the word count of several types of write-ups in the realm of research:

Research Proposal

Specific Purpose/s: A preliminary outline that contains the research question, minimal literature review, methodology, and significance of the research undertaking.

"Word Count Range: 1500-3000 words"

Review Article

Specific Purpose/s: Review bodies of literature about an overarching topic or niche, analyze a particular section, synthesize according to certain themes, and identify knowledge gaps from the findings.

"Word Count Range: 5000-10,000 words"

Meta-Analysis

Specific Purpose/s: Involves the use of statistical analyses of multiple studies to provide a quantitative synthesis of the evidence.

"Word Count Range: 5000-15,000 words"

Specific Purpose/s: Presents an in-depth and intrusive analysis of a specific case, one which aims to illustrate a broader concept or novel phenomenon.

"Word Count Range: 1500-5000 words"

Conference Paper

Specific Purpose/s: Presents a brief introduction, salient research findings, and implications connected to a given theme by a conference or colloquium.

"Word Count Range: 2000-5000 words"

Dissertation

Specific Purpose/s: Regarded as a terminal scholarly requirement for doctorate students, this is an in-depth discussion of an otherwise original research finding, often written in chapters. It contributes significantly to the body of knowledge of a particular study of interest.

"Word Count Range: 50,000-100,000 words (depending on the institution)"

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Frequently Asked Questions

How long is the introduction in a research paper.

AThe introduction takes up about 30-40% of the entire paper since the context and research background should be specified and further discussed. For a general academic paper with 4000 words, the introduction must be approximately 1500 words. You can do the math for the rest!

How long is a research paper, considering that there are many of them?

There is no one-size-fits-all guideline in determining the word count of a plethora of research papers in the world. Although there is an accepted word count range for each research type (as presented in the previous section), there are several factors that should likewise be considered in determining the word count: specific guidelines set by the institution you are working with, the complexity of the topic, audience, and depth of analysis. 

Do I have to include all of the prescribed subsections of the introduction to increase the word count?

While the prescribed subsections have significant functions in the research paper introduction, some of them are not required to be included. The decisions depend on the type of research you wish to conduct and the external guidelines that you might need to follow. Some disciplines, such as social sciences, require a research article to have a theoretical framework, whereas others do not. Some research papers follow the standard IMRAD paper format that infuses the literature review section into the introduction, while the Germanic Thesis paper format, for example, regards the former as a separate section.

How do I increase my word count without compromising the quality of my research paper?

The dilemma of choosing quality over quantity has long been debunked: you do not have to choose in the first place. All you need is a set of writing strategies and techniques that will target those two birds using one stone. You may provide more detail to some ambiguous or novel terms. You can add additional works of literature to some concepts that promote abstraction. You may include examples or empirical pieces of evidence to create a more concrete representation of a concept or theory. Lastly, you may use subheadings to efficiently allocate word count for your chosen discussion topics.

Why is it important to track the word count of a research paper?

There are various reasons why we need to do it. Some institutions that publish scholarly journals follow certain guidelines in word count as one of the primary requirements. A specified limit enables researchers to allocate the number of words to several sections of their writing efficiently. Most institutions also use paper length as a predictor of publication cost. The longer the word count is, the costlier the publication will be. Lastly, reading engagement is affected by word count, as readers tend to shy away from reading an article that is long, boring, and insubstantial. 

Can a writing service help me achieve my goals of writing within the right word count range?

Certainly! Studyfy offers several academic services, including writing services and research papers for sale . Understanding your various writing needs, writers can cater to the needed style, word count, formatting, and any other aspects so that you can have the best quality write-up without having to fear extra charges and big markups.

Writing academically: Paragraph structure

• Academic style
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Paragraph structure

• Using sources in your writing

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“An appropriate use of paragraphs is an essential part of writing coherent and well-structured essays.” Don Shiach,   How to write essays

• A topic sentence – what is the overall point that the paragraph is making?
• Evidence that supports your point – this is usually your cited material.
• Explanation of why the point is important and how it helps with your overall argument.
• A link (if necessary) to the next paragraph (or to the previous one if coming at the beginning of the paragraph) or back to the essay question.

This is a good order to use when you are new to writing academic essays - but as you get more accomplished you can adapt it as necessary. The important thing is to make sure all of these elements are present within the paragraph.

The sections below explain more about each of these elements.

The topic sentence (Point)

This should appear early in the paragraph and is often, but not always, the first sentence.  It should clearly state the main point that you are making in the paragraph. When you are planning essays, writing down a list of your topic sentences is an excellent way to check that your argument flows well from one point to the next.

This is the evidence that backs up your topic sentence. Why do you believe what you have written in your topic sentence? The evidence is usually paraphrased or quoted material from your reading . Depending on the nature of the assignment, it could also include:

• Your own data (in a research project for example).
• Personal experiences from practice (especially for Social Care, Health Sciences and Education).
• Personal experiences from learning (in a reflective essay for example).

Any evidence from external sources should, of course, be referenced.

Explanation (analysis)

This is the part of your paragraph where you explain to your reader why the evidence supports the point and why that point is relevant to your overall argument. It is where you answer the question 'So what?'. Tell the reader how the information in the paragraph helps you answer the question and how it leads to your conclusion. Your analysis should attempt to persuade the reader that your conclusion is the correct one.

These are the parts of your paragraphs that will get you the higher marks in any marking scheme.

Links are optional but it will help your argument flow if you include them. They are sentences that help the reader understand how the parts of your argument are connected . Most commonly they come at the end of the paragraph but they can be equally effective at the beginning of the next one. Sometimes a link is split between the end of one paragraph and the beginning of the next (see the example paragraph below).

Paragraph structure video

Length of a paragraph

Academic paragraphs are usually between 200 and 300 words long (they vary more than this but it is a useful guide). The important thing is that they should be long enough to contain all the above material. Only move onto a new paragraph if you are making a new point. 

Many students make their paragraphs too short (because they are not including enough or any analysis) or too long (they are made up of several different points).

Example of an academic paragraph

Using storytelling in educational settings can enable educators to connect with their students because of inborn tendencies for humans to listen to stories.   Written languages have only existed for between 6,000 and 7,000 years (Daniels & Bright, 1995) before then, and continually ever since in many cultures, important lessons for life were passed on using the oral tradition of storytelling. These varied from simple informative tales, to help us learn how to find food or avoid danger, to more magical and miraculous stories designed to help us see how we can resolve conflict and find our place in society (Zipes, 2012). Oral storytelling traditions are still fundamental to native American culture and Rebecca Bishop, a native American public relations officer (quoted in Sorensen, 2012) believes that the physical act of storytelling is a special thing; children will automatically stop what they are doing and listen when a story is told. Professional communicators report that this continues to adulthood (Simmons, 2006; Stevenson, 2008).   This means that storytelling can be a powerful tool for connecting with students of all ages in a way that a list of bullet points in a PowerPoint presentation cannot. The emotional connection and innate, almost hardwired, need to listen when someone tells a story means that educators can teach memorable lessons in a uniquely engaging manner that is   common to all cultures. 

This cross-cultural element of storytelling can be seen when reading or listening to wisdom tales from around the world...

Key:   Topic sentence    Evidence (includes some analysis)    Analysis   Link (crosses into next paragraph)

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12.1 Creating a Rough Draft for a Research Paper

Learning objectives.

• Apply strategies for drafting an effective introduction and conclusion.
• Identify when and how to summarize, paraphrase, and directly quote information from research sources.
• Apply guidelines for citing sources within the body of the paper and the bibliography.
• Use primary and secondary research to support ideas.
• Identify the purposes for which writers use each type of research.

At last, you are ready to begin writing the rough draft of your research paper. Putting your thinking and research into words is exciting. It can also be challenging. In this section, you will learn strategies for handling the more challenging aspects of writing a research paper, such as integrating material from your sources, citing information correctly, and avoiding any misuse of your sources.

The Structure of a Research Paper

Research papers generally follow the same basic structure: an introduction that presents the writer’s thesis, a body section that develops the thesis with supporting points and evidence, and a conclusion that revisits the thesis and provides additional insights or suggestions for further research.

Your writing voice will come across most strongly in your introduction and conclusion, as you work to attract your readers’ interest and establish your thesis. These sections usually do not cite sources at length. They focus on the big picture, not specific details. In contrast, the body of your paper will cite sources extensively. As you present your ideas, you will support your points with details from your research.

Writing Your Introduction

There are several approaches to writing an introduction, each of which fulfills the same goals. The introduction should get readers’ attention, provide background information, and present the writer’s thesis. Many writers like to begin with one of the following catchy openers:

• A surprising fact
• A thought-provoking question
• An attention-getting quote
• A brief anecdote that illustrates a larger concept
• A connection between your topic and your readers’ experiences

The next few sentences place the opening in context by presenting background information. From there, the writer builds toward a thesis, which is traditionally placed at the end of the introduction. Think of your thesis as a signpost that lets readers know in what direction the paper is headed.

Jorge decided to begin his research paper by connecting his topic to readers’ daily experiences. Read the first draft of his introduction. The thesis is underlined. Note how Jorge progresses from the opening sentences to background information to his thesis.

Beyond the Hype: Evaluating Low-Carb Diets

I. Introduction

Over the past decade, increasing numbers of Americans have jumped on the low-carb bandwagon. Some studies estimate that approximately 40 million Americans, or about 20 percent of the population, are attempting to restrict their intake of food high in carbohydrates (Sanders and Katz, 2004; Hirsch, 2004). Proponents of low-carb diets say they are not only the most effective way to lose weight, but they also yield health benefits such as lower blood pressure and improved cholesterol levels. Meanwhile, some doctors claim that low-carb diets are overrated and caution that their long-term effects are unknown. Although following a low-carbohydrate diet can benefit some people, these diets are not necessarily the best option for everyone who wants to lose weight or improve their health.

Write the introductory paragraph of your research paper. Try using one of the techniques listed in this section to write an engaging introduction. Be sure to include background information about the topic that leads to your thesis.

Writers often work out of sequence when writing a research paper. If you find yourself struggling to write an engaging introduction, you may wish to write the body of your paper first. Writing the body sections first will help you clarify your main points. Writing the introduction should then be easier. You may have a better sense of how to introduce the paper after you have drafted some or all of the body.

Writing Your Conclusion

In your introduction, you tell readers where they are headed. In your conclusion, you recap where they have been. For this reason, some writers prefer to write their conclusions soon after they have written their introduction. However, this method may not work for all writers. Other writers prefer to write their conclusion at the end of the paper, after writing the body paragraphs. No process is absolutely right or absolutely wrong; find the one that best suits you.

No matter when you compose the conclusion, it should sum up your main ideas and revisit your thesis. The conclusion should not simply echo the introduction or rely on bland summary statements, such as “In this paper, I have demonstrated that.…” In fact, avoid repeating your thesis verbatim from the introduction. Restate it in different words that reflect the new perspective gained through your research. That helps keep your ideas fresh for your readers. An effective writer might conclude a paper by asking a new question the research inspired, revisiting an anecdote presented earlier, or reminding readers of how the topic relates to their lives.

Writing at Work

If your job involves writing or reading scientific papers, it helps to understand how professional researchers use the structure described in this section. A scientific paper begins with an abstract that briefly summarizes the entire paper. The introduction explains the purpose of the research, briefly summarizes previous research, and presents the researchers’ hypothesis. The body provides details about the study, such as who participated in it, what the researchers measured, and what results they recorded. The conclusion presents the researchers’ interpretation of the data, or what they learned.

Using Source Material in Your Paper

One of the challenges of writing a research paper is successfully integrating your ideas with material from your sources. Your paper must explain what you think, or it will read like a disconnected string of facts and quotations. However, you also need to support your ideas with research, or they will seem insubstantial. How do you strike the right balance?

You have already taken a step in the right direction by writing your introduction. The introduction and conclusion function like the frame around a picture. They define and limit your topic and place your research in context.

In the body paragraphs of your paper, you will need to integrate ideas carefully at the paragraph level and at the sentence level. You will use topic sentences in your paragraphs to make sure readers understand the significance of any facts, details, or quotations you cite. You will also include sentences that transition between ideas from your research, either within a paragraph or between paragraphs. At the sentence level, you will need to think carefully about how you introduce paraphrased and quoted material.

Earlier you learned about summarizing, paraphrasing, and quoting when taking notes. In the next few sections, you will learn how to use these techniques in the body of your paper to weave in source material to support your ideas.

Summarizing Sources

When you summarize material from a source, you zero in on the main points and restate them concisely in your own words. This technique is appropriate when only the major ideas are relevant to your paper or when you need to simplify complex information into a few key points for your readers.

Be sure to review the source material as you summarize it. Identify the main idea and restate it as concisely as you can—preferably in one sentence. Depending on your purpose, you may also add another sentence or two condensing any important details or examples. Check your summary to make sure it is accurate and complete.

In his draft, Jorge summarized research materials that presented scientists’ findings about low-carbohydrate diets. Read the following passage from a trade magazine article and Jorge’s summary of the article.

Assessing the Efficacy of Low-Carbohydrate Diets

Adrienne Howell, Ph.D.

Over the past few years, a number of clinical studies have explored whether high-protein, low-carbohydrate diets are more effective for weight loss than other frequently recommended diet plans, such as diets that drastically curtail fat intake (Pritikin) or that emphasize consuming lean meats, grains, vegetables, and a moderate amount of unsaturated fats (the Mediterranean diet). A 2009 study found that obese teenagers who followed a low-carbohydrate diet lost an average of 15.6 kilograms over a six-month period, whereas teenagers following a low-fat diet or a Mediterranean diet lost an average of 11.1 kilograms and 9.3 kilograms respectively. Two 2010 studies that measured weight loss for obese adults following these same three diet plans found similar results. Over three months, subjects on the low-carbohydrate diet plan lost anywhere from four to six kilograms more than subjects who followed other diet plans.

In three recent studies, researchers compared outcomes for obese subjects who followed either a low-carbohydrate diet, a low-fat diet, or a Mediterranean diet and found that subjects following a low-carbohydrate diet lost more weight in the same time (Howell, 2010).

A summary restates ideas in your own words—but for specialized or clinical terms, you may need to use terms that appear in the original source. For instance, Jorge used the term obese in his summary because related words such as heavy or overweight have a different clinical meaning.

On a separate sheet of paper, practice summarizing by writing a one-sentence summary of the same passage that Jorge already summarized.

Paraphrasing Sources

When you paraphrase material from a source, restate the information from an entire sentence or passage in your own words, using your own original sentence structure. A paraphrased source differs from a summarized source in that you focus on restating the ideas, not condensing them.

Again, it is important to check your paraphrase against the source material to make sure it is both accurate and original. Inexperienced writers sometimes use the thesaurus method of paraphrasing—that is, they simply rewrite the source material, replacing most of the words with synonyms. This constitutes a misuse of sources. A true paraphrase restates ideas using the writer’s own language and style.

In his draft, Jorge frequently paraphrased details from sources. At times, he needed to rewrite a sentence more than once to ensure he was paraphrasing ideas correctly. Read the passage from a website. Then read Jorge’s initial attempt at paraphrasing it, followed by the final version of his paraphrase.

Dieters nearly always get great results soon after they begin following a low-carbohydrate diet, but these results tend to taper off after the first few months, particularly because many dieters find it difficult to follow a low-carbohydrate diet plan consistently.

People usually see encouraging outcomes shortly after they go on a low-carbohydrate diet, but their progress slows down after a short while, especially because most discover that it is a challenge to adhere to the diet strictly (Heinz, 2009).

After reviewing the paraphrased sentence, Jorge realized he was following the original source too closely. He did not want to quote the full passage verbatim, so he again attempted to restate the idea in his own style.

Because it is hard for dieters to stick to a low-carbohydrate eating plan, the initial success of these diets is short-lived (Heinz, 2009).

On a separate sheet of paper, follow these steps to practice paraphrasing.

• Choose an important idea or detail from your notes.
• Without looking at the original source, restate the idea in your own words.
• Check your paraphrase against the original text in the source. Make sure both your language and your sentence structure are original.
• Revise your paraphrase if necessary.

Quoting Sources Directly

Most of the time, you will summarize or paraphrase source material instead of quoting directly. Doing so shows that you understand your research well enough to write about it confidently in your own words. However, direct quotes can be powerful when used sparingly and with purpose.

Quoting directly can sometimes help you make a point in a colorful way. If an author’s words are especially vivid, memorable, or well phrased, quoting them may help hold your reader’s interest. Direct quotations from an interviewee or an eyewitness may help you personalize an issue for readers. And when you analyze primary sources, such as a historical speech or a work of literature, quoting extensively is often necessary to illustrate your points. These are valid reasons to use quotations.

Less experienced writers, however, sometimes overuse direct quotations in a research paper because it seems easier than paraphrasing. At best, this reduces the effectiveness of the quotations. At worst, it results in a paper that seems haphazardly pasted together from outside sources. Use quotations sparingly for greater impact.

When you do choose to quote directly from a source, follow these guidelines:

• Make sure you have transcribed the original statement accurately.
• Represent the author’s ideas honestly. Quote enough of the original text to reflect the author’s point accurately.
• Never use a stand-alone quotation. Always integrate the quoted material into your own sentence.
• Use ellipses (…) if you need to omit a word or phrase. Use brackets [ ] if you need to replace a word or phrase.
• Make sure any omissions or changed words do not alter the meaning of the original text. Omit or replace words only when absolutely necessary to shorten the text or to make it grammatically correct within your sentence.
• Remember to include correctly formatted citations that follow the assigned style guide.

Jorge interviewed a dietician as part of his research, and he decided to quote her words in his paper. Read an excerpt from the interview and Jorge’s use of it, which follows.

Personally, I don’t really buy into all of the hype about low-carbohydrate miracle diets like Atkins and so on. Sure, for some people, they are great, but for most, any sensible eating and exercise plan would work just as well.

Registered dietician Dana Kwon (2010) admits, “Personally, I don’t really buy into all of the hype.…Sure, for some people, [low-carbohydrate diets] are great, but for most, any sensible eating and exercise plan would work just as well.”

Notice how Jorge smoothly integrated the quoted material by starting the sentence with an introductory phrase. His use of ellipses and brackets did not change the source’s meaning.

Documenting Source Material

Throughout the writing process, be scrupulous about documenting information taken from sources. The purpose of doing so is twofold:

• To give credit to other writers or researchers for their ideas
• To allow your reader to follow up and learn more about the topic if desired

You will cite sources within the body of your paper and at the end of the paper in your bibliography. For this assignment, you will use the citation format used by the American Psychological Association (also known as APA style). For information on the format used by the Modern Language Association (MLA style), see Chapter 13 “APA and MLA Documentation and Formatting” .

Citing Sources in the Body of Your Paper

In-text citations document your sources within the body of your paper. These include two vital pieces of information: the author’s name and the year the source material was published. When quoting a print source, also include in the citation the page number where the quoted material originally appears. The page number will follow the year in the in-text citation. Page numbers are necessary only when content has been directly quoted, not when it has been summarized or paraphrased.

Within a paragraph, this information may appear as part of your introduction to the material or as a parenthetical citation at the end of a sentence. Read the examples that follow. For more information about in-text citations for other source types, see Chapter 13 “APA and MLA Documentation and Formatting” .

Leibowitz (2008) found that low-carbohydrate diets often helped subjects with Type II diabetes maintain a healthy weight and control blood-sugar levels.

The introduction to the source material includes the author’s name followed by the year of publication in parentheses.

Low-carbohydrate diets often help subjects with Type II diabetes maintain a healthy weight and control blood-sugar levels (Leibowitz, 2008).

The parenthetical citation at the end of the sentence includes the author’s name, a comma, and the year the source was published. The period at the end of the sentence comes after the parentheses.

Creating a List of References

Each of the sources you cite in the body text will appear in a references list at the end of your paper. While in-text citations provide the most basic information about the source, your references section will include additional publication details. In general, you will include the following information:

• The author’s last name followed by his or her first (and sometimes middle) initial
• The year the source was published
• The source title
• For articles in periodicals, the full name of the periodical, along with the volume and issue number and the pages where the article appeared

Additional information may be included for different types of sources, such as online sources. For a detailed guide to APA or MLA citations, see Chapter 13 “APA and MLA Documentation and Formatting” . A sample reference list is provided with the final draft of Jorge’s paper later in this chapter.

Using Primary and Secondary Research

As you write your draft, be mindful of how you are using primary and secondary source material to support your points. Recall that primary sources present firsthand information. Secondary sources are one step removed from primary sources. They present a writer’s analysis or interpretation of primary source materials. How you balance primary and secondary source material in your paper will depend on the topic and assignment.

Using Primary Sources Effectively

Some types of research papers must use primary sources extensively to achieve their purpose. Any paper that analyzes a primary text or presents the writer’s own experimental research falls in this category. Here are a few examples:

• A paper for a literature course analyzing several poems by Emily Dickinson
• A paper for a political science course comparing televised speeches delivered by two presidential candidates
• A paper for a communications course discussing gender biases in television commercials
• A paper for a business administration course that discusses the results of a survey the writer conducted with local businesses to gather information about their work-from-home and flextime policies
• A paper for an elementary education course that discusses the results of an experiment the writer conducted to compare the effectiveness of two different methods of mathematics instruction

For these types of papers, primary research is the main focus. If you are writing about a work (including nonprint works, such as a movie or a painting), it is crucial to gather information and ideas from the original work, rather than relying solely on others’ interpretations. And, of course, if you take the time to design and conduct your own field research, such as a survey, a series of interviews, or an experiment, you will want to discuss it in detail. For example, the interviews may provide interesting responses that you want to share with your reader.

Using Secondary Sources Effectively

For some assignments, it makes sense to rely more on secondary sources than primary sources. If you are not analyzing a text or conducting your own field research, you will need to use secondary sources extensively.

As much as possible, use secondary sources that are closely linked to primary research, such as a journal article presenting the results of the authors’ scientific study or a book that cites interviews and case studies. These sources are more reliable and add more value to your paper than sources that are further removed from primary research. For instance, a popular magazine article on junk-food addiction might be several steps removed from the original scientific study on which it is loosely based. As a result, the article may distort, sensationalize, or misinterpret the scientists’ findings.

Even if your paper is largely based on primary sources, you may use secondary sources to develop your ideas. For instance, an analysis of Alfred Hitchcock’s films would focus on the films themselves as a primary source, but might also cite commentary from critics. A paper that presents an original experiment would include some discussion of similar prior research in the field.

Jorge knew he did not have the time, resources, or experience needed to conduct original experimental research for his paper. Because he was relying on secondary sources to support his ideas, he made a point of citing sources that were not far removed from primary research.

Some sources could be considered primary or secondary sources, depending on the writer’s purpose for using them. For instance, if a writer’s purpose is to inform readers about how the No Child Left Behind legislation has affected elementary education, a Time magazine article on the subject would be a secondary source. However, suppose the writer’s purpose is to analyze how the news media has portrayed the effects of the No Child Left Behind legislation. In that case, articles about the legislation in news magazines like Time , Newsweek , and US News & World Report would be primary sources. They provide firsthand examples of the media coverage the writer is analyzing.

Avoiding Plagiarism

Your research paper presents your thinking about a topic, supported and developed by other people’s ideas and information. It is crucial to always distinguish between the two—as you conduct research, as you plan your paper, and as you write. Failure to do so can lead to plagiarism.

Intentional and Accidental Plagiarism

Plagiarism is the act of misrepresenting someone else’s work as your own. Sometimes a writer plagiarizes work on purpose—for instance, by purchasing an essay from a website and submitting it as original course work. In other cases, a writer may commit accidental plagiarism due to carelessness, haste, or misunderstanding. To avoid unintentional plagiarism, follow these guidelines:

• Understand what types of information must be cited.
• Understand what constitutes fair use of a source.
• Keep source materials and notes carefully organized.
• Follow guidelines for summarizing, paraphrasing, and quoting sources.

When to Cite

Any idea or fact taken from an outside source must be cited, in both the body of your paper and the references list. The only exceptions are facts or general statements that are common knowledge. Common-knowledge facts or general statements are commonly supported by and found in multiple sources. For example, a writer would not need to cite the statement that most breads, pastas, and cereals are high in carbohydrates; this is well known and well documented. However, if a writer explained in detail the differences among the chemical structures of carbohydrates, proteins, and fats, a citation would be necessary. When in doubt, cite.

In recent years, issues related to the fair use of sources have been prevalent in popular culture. Recording artists, for example, may disagree about the extent to which one has the right to sample another’s music. For academic purposes, however, the guidelines for fair use are reasonably straightforward.

Writers may quote from or paraphrase material from previously published works without formally obtaining the copyright holder’s permission. Fair use means that the writer legitimately uses brief excerpts from source material to support and develop his or her own ideas. For instance, a columnist may excerpt a few sentences from a novel when writing a book review. However, quoting or paraphrasing another’s work at excessive length, to the extent that large sections of the writing are unoriginal, is not fair use.

As he worked on his draft, Jorge was careful to cite his sources correctly and not to rely excessively on any one source. Occasionally, however, he caught himself quoting a source at great length. In those instances, he highlighted the paragraph in question so that he could go back to it later and revise. Read the example, along with Jorge’s revision.

Heinz (2009) found that “subjects in the low-carbohydrate group (30% carbohydrates; 40% protein, 30% fat) had a mean weight loss of 10 kg (22 lbs) over a 4-month period.” These results were “noticeably better than results for subjects on a low-fat diet (45% carbohydrates, 35% protein, 20% fat)” whose average weight loss was only “7 kg (15.4 lbs) in the same period.” From this, it can be concluded that “low-carbohydrate diets obtain more rapid results.” Other researchers agree that “at least in the short term, patients following low-carbohydrate diets enjoy greater success” than those who follow alternative plans (Johnson & Crowe, 2010).

After reviewing the paragraph, Jorge realized that he had drifted into unoriginal writing. Most of the paragraph was taken verbatim from a single article. Although Jorge had enclosed the material in quotation marks, he knew it was not an appropriate way to use the research in his paper.

Low-carbohydrate diets may indeed be superior to other diet plans for short-term weight loss. In a study comparing low-carbohydrate diets and low-fat diets, Heinz (2009) found that subjects who followed a low-carbohydrate plan (30% of total calories) for 4 months lost, on average, about 3 kilograms more than subjects who followed a low-fat diet for the same time. Heinz concluded that these plans yield quick results, an idea supported by a similar study conducted by Johnson and Crowe (2010). What remains to be seen, however, is whether this initial success can be sustained for longer periods.

As Jorge revised the paragraph, he realized he did not need to quote these sources directly. Instead, he paraphrased their most important findings. He also made sure to include a topic sentence stating the main idea of the paragraph and a concluding sentence that transitioned to the next major topic in his essay.

Working with Sources Carefully

Disorganization and carelessness sometimes lead to plagiarism. For instance, a writer may be unable to provide a complete, accurate citation if he didn’t record bibliographical information. A writer may cut and paste a passage from a website into her paper and later forget where the material came from. A writer who procrastinates may rush through a draft, which easily leads to sloppy paraphrasing and inaccurate quotations. Any of these actions can create the appearance of plagiarism and lead to negative consequences.

Carefully organizing your time and notes is the best guard against these forms of plagiarism. Maintain a detailed working bibliography and thorough notes throughout the research process. Check original sources again to clear up any uncertainties. Allow plenty of time for writing your draft so there is no temptation to cut corners.

Citing other people’s work appropriately is just as important in the workplace as it is in school. If you need to consult outside sources to research a document you are creating, follow the general guidelines already discussed, as well as any industry-specific citation guidelines. For more extensive use of others’ work—for instance, requesting permission to link to another company’s website on your own corporate website—always follow your employer’s established procedures.

Academic Integrity

The concepts and strategies discussed in this section of Chapter 12 “Writing a Research Paper” connect to a larger issue—academic integrity. You maintain your integrity as a member of an academic community by representing your work and others’ work honestly and by using other people’s work only in legitimately accepted ways. It is a point of honor taken seriously in every academic discipline and career field.

Academic integrity violations have serious educational and professional consequences. Even when cheating and plagiarism go undetected, they still result in a student’s failure to learn necessary research and writing skills. Students who are found guilty of academic integrity violations face consequences ranging from a failing grade to expulsion from the university. Employees may be fired for plagiarism and do irreparable damage to their professional reputation. In short, it is never worth the risk.

Key Takeaways

• An effective research paper focuses on the writer’s ideas. The introduction and conclusion present and revisit the writer’s thesis. The body of the paper develops the thesis and related points with information from research.
• Ideas and information taken from outside sources must be cited in the body of the paper and in the references section.
• Material taken from sources should be used to develop the writer’s ideas. Summarizing and paraphrasing are usually most effective for this purpose.
• A summary concisely restates the main ideas of a source in the writer’s own words.
• A paraphrase restates ideas from a source using the writer’s own words and sentence structures.
• Direct quotations should be used sparingly. Ellipses and brackets must be used to indicate words that were omitted or changed for conciseness or grammatical correctness.
• Always represent material from outside sources accurately.
• Plagiarism has serious academic and professional consequences. To avoid accidental plagiarism, keep research materials organized, understand guidelines for fair use and appropriate citation of sources, and review the paper to make sure these guidelines are followed.

Writing for Success Copyright © 2015 by University of Minnesota is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License , except where otherwise noted.

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How to Write a Research Paper Introduction (with Examples)

The research paper introduction section, along with the Title and Abstract, can be considered the face of any research paper. The following article is intended to guide you in organizing and writing the research paper introduction for a quality academic article or dissertation.

The research paper introduction aims to present the topic to the reader. A study will only be accepted for publishing if you can ascertain that the available literature cannot answer your research question. So it is important to ensure that you have read important studies on that particular topic, especially those within the last five to ten years, and that they are properly referenced in this section. 1 What should be included in the research paper introduction is decided by what you want to tell readers about the reason behind the research and how you plan to fill the knowledge gap. The best research paper introduction provides a systemic review of existing work and demonstrates additional work that needs to be done. It needs to be brief, captivating, and well-referenced; a well-drafted research paper introduction will help the researcher win half the battle.

The introduction for a research paper is where you set up your topic and approach for the reader. It has several key goals:

• Present your research topic
• Capture reader interest
• Summarize existing research
• Position your own approach
• Define your specific research problem and problem statement
• Highlight the novelty and contributions of the study
• Give an overview of the paper’s structure

The research paper introduction can vary in size and structure depending on whether your paper presents the results of original empirical research or is a review paper. Some research paper introduction examples are only half a page while others are a few pages long. In many cases, the introduction will be shorter than all of the other sections of your paper; its length depends on the size of your paper as a whole.

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Table of Contents

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The introduction in a research paper is placed at the beginning to guide the reader from a broad subject area to the specific topic that your research addresses. They present the following information to the reader

• Scope: The topic covered in the research paper
• Context: Background of your topic
• Importance: Why your research matters in that particular area of research and the industry problem that can be targeted

The research paper introduction conveys a lot of information and can be considered an essential roadmap for the rest of your paper. A good introduction for a research paper is important for the following reasons:

• It stimulates your reader’s interest: A good introduction section can make your readers want to read your paper by capturing their interest. It informs the reader what they are going to learn and helps determine if the topic is of interest to them.
• It helps the reader understand the research background: Without a clear introduction, your readers may feel confused and even struggle when reading your paper. A good research paper introduction will prepare them for the in-depth research to come. It provides you the opportunity to engage with the readers and demonstrate your knowledge and authority on the specific topic.
• It explains why your research paper is worth reading: Your introduction can convey a lot of information to your readers. It introduces the topic, why the topic is important, and how you plan to proceed with your research.
• It helps guide the reader through the rest of the paper: The research paper introduction gives the reader a sense of the nature of the information that will support your arguments and the general organization of the paragraphs that will follow. It offers an overview of what to expect when reading the main body of your paper.

What are the parts of introduction in the research?

A good research paper introduction section should comprise three main elements: 2

• What is known: This sets the stage for your research. It informs the readers of what is known on the subject.
• What is lacking: This is aimed at justifying the reason for carrying out your research. This could involve investigating a new concept or method or building upon previous research.
• What you aim to do: This part briefly states the objectives of your research and its major contributions. Your detailed hypothesis will also form a part of this section.

How to write a research paper introduction?

The first step in writing the research paper introduction is to inform the reader what your topic is and why it’s interesting or important. This is generally accomplished with a strong opening statement. The second step involves establishing the kinds of research that have been done and ending with limitations or gaps in the research that you intend to address. Finally, the research paper introduction clarifies how your own research fits in and what problem it addresses. If your research involved testing hypotheses, these should be stated along with your research question. The hypothesis should be presented in the past tense since it will have been tested by the time you are writing the research paper introduction.

The following key points, with examples, can guide you when writing the research paper introduction section:

• Highlight the importance of the research field or topic
• Describe the background of the topic
• Present an overview of current research on the topic

Example: The inclusion of experiential and competency-based learning has benefitted electronics engineering education. Industry partnerships provide an excellent alternative for students wanting to engage in solving real-world challenges. Industry-academia participation has grown in recent years due to the need for skilled engineers with practical training and specialized expertise. However, from the educational perspective, many activities are needed to incorporate sustainable development goals into the university curricula and consolidate learning innovation in universities.

• Reveal a gap in existing research or oppose an existing assumption
• Formulate the research question

Example: There have been plausible efforts to integrate educational activities in higher education electronics engineering programs. However, very few studies have considered using educational research methods for performance evaluation of competency-based higher engineering education, with a focus on technical and or transversal skills. To remedy the current need for evaluating competencies in STEM fields and providing sustainable development goals in engineering education, in this study, a comparison was drawn between study groups without and with industry partners.

• State the purpose of your study
• Highlight the key characteristics of your study
• Describe important results
• Highlight the novelty of the study.
• Offer a brief overview of the structure of the paper.

Example: The study evaluates the main competency needed in the applied electronics course, which is a fundamental core subject for many electronics engineering undergraduate programs. We compared two groups, without and with an industrial partner, that offered real-world projects to solve during the semester. This comparison can help determine significant differences in both groups in terms of developing subject competency and achieving sustainable development goals.

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Paperpal Copilot is a generative AI-powered academic writing assistant. It’s trained on millions of published scholarly articles and over 20 years of STM experience. Paperpal Copilot helps authors write better and faster with:

• Real-time writing suggestions
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With Paperpal Copilot, create a research paper introduction effortlessly. In this step-by-step guide, we’ll walk you through how Paperpal transforms your initial ideas into a polished and publication-ready introduction.

How to use Paperpal to write the Introduction section

Step 1: Sign up on Paperpal and click on the Copilot feature, under this choose Outlines > Research Article > Introduction

Step 2: Add your unstructured notes or initial draft, whether in English or another language, to Paperpal, which is to be used as the base for your content.

Step 3: Fill in the specifics, such as your field of study, brief description or details you want to include, which will help the AI generate the outline for your Introduction.

Step 4: Use this outline and sentence suggestions to develop your content, adding citations where needed and modifying it to align with your specific research focus.

Step 5: Turn to Paperpal’s granular language checks to refine your content, tailor it to reflect your personal writing style, and ensure it effectively conveys your message.

You can use the same process to develop each section of your article, and finally your research paper in half the time and without any of the stress.

The purpose of the research paper introduction is to introduce the reader to the problem definition, justify the need for the study, and describe the main theme of the study. The aim is to gain the reader’s attention by providing them with necessary background information and establishing the main purpose and direction of the research.

The length of the research paper introduction can vary across journals and disciplines. While there are no strict word limits for writing the research paper introduction, an ideal length would be one page, with a maximum of 400 words over 1-4 paragraphs. Generally, it is one of the shorter sections of the paper as the reader is assumed to have at least a reasonable knowledge about the topic. 2 For example, for a study evaluating the role of building design in ensuring fire safety, there is no need to discuss definitions and nature of fire in the introduction; you could start by commenting upon the existing practices for fire safety and how your study will add to the existing knowledge and practice.

When deciding what to include in the research paper introduction, the rest of the paper should also be considered. The aim is to introduce the reader smoothly to the topic and facilitate an easy read without much dependency on external sources. 3 Below is a list of elements you can include to prepare a research paper introduction outline and follow it when you are writing the research paper introduction. Topic introduction: This can include key definitions and a brief history of the topic. Research context and background: Offer the readers some general information and then narrow it down to specific aspects. Details of the research you conducted: A brief literature review can be included to support your arguments or line of thought. Rationale for the study: This establishes the relevance of your study and establishes its importance. Importance of your research: The main contributions are highlighted to help establish the novelty of your study Research hypothesis: Introduce your research question and propose an expected outcome. Organization of the paper: Include a short paragraph of 3-4 sentences that highlights your plan for the entire paper

Cite only works that are most relevant to your topic; as a general rule, you can include one to three. Note that readers want to see evidence of original thinking. So it is better to avoid using too many references as it does not leave much room for your personal standpoint to shine through. Citations in your research paper introduction support the key points, and the number of citations depend on the subject matter and the point discussed. If the research paper introduction is too long or overflowing with citations, it is better to cite a few review articles rather than the individual articles summarized in the review. A good point to remember when citing research papers in the introduction section is to include at least one-third of the references in the introduction.

The literature review plays a significant role in the research paper introduction section. A good literature review accomplishes the following: Introduces the topic – Establishes the study’s significance – Provides an overview of the relevant literature – Provides context for the study using literature – Identifies knowledge gaps However, remember to avoid making the following mistakes when writing a research paper introduction: Do not use studies from the literature review to aggressively support your research Avoid direct quoting Do not allow literature review to be the focus of this section. Instead, the literature review should only aid in setting a foundation for the manuscript.

Remember the following key points for writing a good research paper introduction: 4

• Avoid stuffing too much general information: Avoid including what an average reader would know and include only that information related to the problem being addressed in the research paper introduction. For example, when describing a comparative study of non-traditional methods for mechanical design optimization, information related to the traditional methods and differences between traditional and non-traditional methods would not be relevant. In this case, the introduction for the research paper should begin with the state-of-the-art non-traditional methods and methods to evaluate the efficiency of newly developed algorithms.
• Avoid packing too many references: Cite only the required works in your research paper introduction. The other works can be included in the discussion section to strengthen your findings.
• Avoid extensive criticism of previous studies: Avoid being overly critical of earlier studies while setting the rationale for your study. A better place for this would be the Discussion section, where you can highlight the advantages of your method.
• Avoid describing conclusions of the study: When writing a research paper introduction remember not to include the findings of your study. The aim is to let the readers know what question is being answered. The actual answer should only be given in the Results and Discussion section.

To summarize, the research paper introduction section should be brief yet informative. It should convince the reader the need to conduct the study and motivate him to read further. If you’re feeling stuck or unsure, choose trusted AI academic writing assistants like Paperpal to effortlessly craft your research paper introduction and other sections of your research article.

1. Jawaid, S. A., & Jawaid, M. (2019). How to write introduction and discussion. Saudi Journal of Anaesthesia, 13(Suppl 1), S18.

2. Dewan, P., & Gupta, P. (2016). Writing the title, abstract and introduction: Looks matter!. Indian pediatrics, 53, 235-241.

3. Cetin, S., & Hackam, D. J. (2005). An approach to the writing of a scientific Manuscript1. Journal of Surgical Research, 128(2), 165-167.

4. Bavdekar, S. B. (2015). Writing introduction: Laying the foundations of a research paper. Journal of the Association of Physicians of India, 63(7), 44-6.

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• Ethical Research Practices For Research with Human Subjects
• 8 Most Effective Ways to Increase Motivation for Thesis Writing 

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Paragraph Length: Data from 9,830 Research Papers

I analyzed a random sample of 9,830 full-text research papers, uploaded to PubMed Central between the years 2016 and 2021, to answer the question:

How long should a paragraph be in a research paper?

I used the BioC API to download the data (see the References section below).

Paragraph length

Our sample of 9,830 research articles had 325,500 paragraphs. The following table summarizes the length of these paragraphs::

From these data we can conclude that:

• The median paragraph length is 4 sentences (or 109 words), and most paragraphs are between 2 and 6 sentences (or 65 and 167 words).
• A paragraph can be just one sentence long. In fact, 13% (n=42,349) of all paragraphs in our sample were 1 sentence long.
• 90% of paragraphs were between 19 and 286 words (1 and 11 sentences). So, a paragraph shorter than 19 words can be considered too short; and a paragraph longer than 286 words (or 11 sentences) can be considered too long.

Paragraph length in each section of the research paper

A research paper is usually divided into 4 sections: Introduction, Methods, Results, and Discussion. The following table shows the median paragraph length for each of these sections:

The Discussion section has slightly longer paragraphs than other sections with a median of 5 sentences and 131 words.

Paragraph length in different types of studies

The data suggests that paragraph length did not differ for different study designs. Review papers (systematic reviews and meta-analyses) had almost the same paragraph length (median=103 words) as original research papers (median=110 words).

• Comeau DC, Wei CH, Islamaj Doğan R, and Lu Z. PMC text mining subset in BioC: about 3 million full text articles and growing,  Bioinformatics , btz070, 2019.

Further reading

• Can a Research Title Be a Question? Real-World Examples
• How Long Should a Research Paper Be? Data from 61,519 Examples
• How Many References to Cite? Based on 96,685 Research Papers
• How Old Should References Be? Based on 3,823,919 Examples

Starting Your Research Paper: Writing an Introductory Paragraph

• Choosing Your Topic
• Define Keywords
• Planning Your Paper
• Writing an Introductory Paragraph

The Dreaded Introductory Paragraph

Writing the introductory paragraph can be a frustrating and slow process -- but it doesn't have to be.  If you planned your paper out, then most of the introductory paragraph is already written.  Now you just need a beginning and an end.

Here's an introductory paragraph for a paper I wrote.  I started the paper with a factoid, then presented each main point of my paper and then ended with my thesis statement.

  Breakdown:

• << Previous: Planning Your Paper
• Last Updated: Feb 12, 2024 12:16 PM
• URL: https://libguides.astate.edu/papers

In a short paper—even a research paper—you don’t need to provide an exhaustive summary as part of your conclusion. But you do need to make some kind of transition between your final body paragraph and your concluding paragraph. This may come in the form of a few sentences of summary. Or it may come in the form of a sentence that brings your readers back to your thesis or main idea and reminds your readers where you began and how far you have traveled.

So, for example, in a paper about the relationship between ADHD and rejection sensitivity, Vanessa Roser begins by introducing readers to the fact that researchers have studied the relationship between the two conditions and then provides her explanation of that relationship. Here’s her thesis: “While socialization may indeed be an important factor in RS, I argue that individuals with ADHD may also possess a neurological predisposition to RS that is exacerbated by the differing executive and emotional regulation characteristic of ADHD.”

In her final paragraph, Roser reminds us of where she started by echoing her thesis: “This literature demonstrates that, as with many other conditions, ADHD and RS share a delicately intertwined pattern of neurological similarities that is rooted in the innate biology of an individual’s mind, a connection that cannot be explained in full by the behavioral mediation hypothesis.”  

Highlight the “so what”  

At the beginning of your paper, you explain to your readers what’s at stake—why they should care about the argument you’re making. In your conclusion, you can bring readers back to those stakes by reminding them why your argument is important in the first place. You can also draft a few sentences that put those stakes into a new or broader context.

In the conclusion to her paper about ADHD and RS, Roser echoes the stakes she established in her introduction—that research into connections between ADHD and RS has led to contradictory results, raising questions about the “behavioral mediation hypothesis.”

She writes, “as with many other conditions, ADHD and RS share a delicately intertwined pattern of neurological similarities that is rooted in the innate biology of an individual’s mind, a connection that cannot be explained in full by the behavioral mediation hypothesis.”  

Leave your readers with the “now what”  

After the “what” and the “so what,” you should leave your reader with some final thoughts. If you have written a strong introduction, your readers will know why you have been arguing what you have been arguing—and why they should care. And if you’ve made a good case for your thesis, then your readers should be in a position to see things in a new way, understand new questions, or be ready for something that they weren’t ready for before they read your paper.

In her conclusion, Roser offers two “now what” statements. First, she explains that it is important to recognize that the flawed behavioral mediation hypothesis “seems to place a degree of fault on the individual. It implies that individuals with ADHD must have elicited such frequent or intense rejection by virtue of their inadequate social skills, erasing the possibility that they may simply possess a natural sensitivity to emotion.” She then highlights the broader implications for treatment of people with ADHD, noting that recognizing the actual connection between rejection sensitivity and ADHD “has profound implications for understanding how individuals with ADHD might best be treated in educational settings, by counselors, family, peers, or even society as a whole.”

To find your own “now what” for your essay’s conclusion, try asking yourself these questions:

• What can my readers now understand, see in a new light, or grapple with that they would not have understood in the same way before reading my paper? Are we a step closer to understanding a larger phenomenon or to understanding why what was at stake is so important?  
• What questions can I now raise that would not have made sense at the beginning of my paper? Questions for further research? Other ways that this topic could be approached?  
• Are there other applications for my research? Could my questions be asked about different data in a different context? Could I use my methods to answer a different question?  
• What action should be taken in light of this argument? What action do I predict will be taken or could lead to a solution?  
• What larger context might my argument be a part of?  

What to avoid in your conclusion  

• a complete restatement of all that you have said in your paper.  
• a substantial counterargument that you do not have space to refute; you should introduce counterarguments before your conclusion.  
• an apology for what you have not said. If you need to explain the scope of your paper, you should do this sooner—but don’t apologize for what you have not discussed in your paper.  
• fake transitions like “in conclusion” that are followed by sentences that aren’t actually conclusions. (“In conclusion, I have now demonstrated that my thesis is correct.”)
• picture_as_pdf Conclusions

Writing an Abstract for Your Research Paper

Definition and Purpose of Abstracts

An abstract is a short summary of your (published or unpublished) research paper, usually about a paragraph (c. 6-7 sentences, 150-250 words) long. A well-written abstract serves multiple purposes:

• an abstract lets readers get the gist or essence of your paper or article quickly, in order to decide whether to read the full paper;
• an abstract prepares readers to follow the detailed information, analyses, and arguments in your full paper;
• and, later, an abstract helps readers remember key points from your paper.

It’s also worth remembering that search engines and bibliographic databases use abstracts, as well as the title, to identify key terms for indexing your published paper. So what you include in your abstract and in your title are crucial for helping other researchers find your paper or article.

If you are writing an abstract for a course paper, your professor may give you specific guidelines for what to include and how to organize your abstract. Similarly, academic journals often have specific requirements for abstracts. So in addition to following the advice on this page, you should be sure to look for and follow any guidelines from the course or journal you’re writing for.

The Contents of an Abstract

Abstracts contain most of the following kinds of information in brief form. The body of your paper will, of course, develop and explain these ideas much more fully. As you will see in the samples below, the proportion of your abstract that you devote to each kind of information—and the sequence of that information—will vary, depending on the nature and genre of the paper that you are summarizing in your abstract. And in some cases, some of this information is implied, rather than stated explicitly. The Publication Manual of the American Psychological Association , which is widely used in the social sciences, gives specific guidelines for what to include in the abstract for different kinds of papers—for empirical studies, literature reviews or meta-analyses, theoretical papers, methodological papers, and case studies.

Here are the typical kinds of information found in most abstracts:

• the context or background information for your research; the general topic under study; the specific topic of your research
• the central questions or statement of the problem your research addresses
• what’s already known about this question, what previous research has done or shown
• the main reason(s) , the exigency, the rationale , the goals for your research—Why is it important to address these questions? Are you, for example, examining a new topic? Why is that topic worth examining? Are you filling a gap in previous research? Applying new methods to take a fresh look at existing ideas or data? Resolving a dispute within the literature in your field? . . .
• your research and/or analytical methods
• your main findings , results , or arguments
• the significance or implications of your findings or arguments.

Your abstract should be intelligible on its own, without a reader’s having to read your entire paper. And in an abstract, you usually do not cite references—most of your abstract will describe what you have studied in your research and what you have found and what you argue in your paper. In the body of your paper, you will cite the specific literature that informs your research.

When to Write Your Abstract

Although you might be tempted to write your abstract first because it will appear as the very first part of your paper, it’s a good idea to wait to write your abstract until after you’ve drafted your full paper, so that you know what you’re summarizing.

What follows are some sample abstracts in published papers or articles, all written by faculty at UW-Madison who come from a variety of disciplines. We have annotated these samples to help you see the work that these authors are doing within their abstracts.

Choosing Verb Tenses within Your Abstract

The social science sample (Sample 1) below uses the present tense to describe general facts and interpretations that have been and are currently true, including the prevailing explanation for the social phenomenon under study. That abstract also uses the present tense to describe the methods, the findings, the arguments, and the implications of the findings from their new research study. The authors use the past tense to describe previous research.

The humanities sample (Sample 2) below uses the past tense to describe completed events in the past (the texts created in the pulp fiction industry in the 1970s and 80s) and uses the present tense to describe what is happening in those texts, to explain the significance or meaning of those texts, and to describe the arguments presented in the article.

The science samples (Samples 3 and 4) below use the past tense to describe what previous research studies have done and the research the authors have conducted, the methods they have followed, and what they have found. In their rationale or justification for their research (what remains to be done), they use the present tense. They also use the present tense to introduce their study (in Sample 3, “Here we report . . .”) and to explain the significance of their study (In Sample 3, This reprogramming . . . “provides a scalable cell source for. . .”).

Sample Abstract 1

From the social sciences.

Reporting new findings about the reasons for increasing economic homogamy among spouses

Gonalons-Pons, Pilar, and Christine R. Schwartz. “Trends in Economic Homogamy: Changes in Assortative Mating or the Division of Labor in Marriage?” Demography , vol. 54, no. 3, 2017, pp. 985-1005.

Sample Abstract 2

From the humanities.

Analyzing underground pulp fiction publications in Tanzania, this article makes an argument about the cultural significance of those publications

Emily Callaci. “Street Textuality: Socialism, Masculinity, and Urban Belonging in Tanzania’s Pulp Fiction Publishing Industry, 1975-1985.” Comparative Studies in Society and History , vol. 59, no. 1, 2017, pp. 183-210.

Sample Abstract/Summary 3

From the sciences.

Reporting a new method for reprogramming adult mouse fibroblasts into induced cardiac progenitor cells

Lalit, Pratik A., Max R. Salick, Daryl O. Nelson, Jayne M. Squirrell, Christina M. Shafer, Neel G. Patel, Imaan Saeed, Eric G. Schmuck, Yogananda S. Markandeya, Rachel Wong, Martin R. Lea, Kevin W. Eliceiri, Timothy A. Hacker, Wendy C. Crone, Michael Kyba, Daniel J. Garry, Ron Stewart, James A. Thomson, Karen M. Downs, Gary E. Lyons, and Timothy J. Kamp. “Lineage Reprogramming of Fibroblasts into Proliferative Induced Cardiac Progenitor Cells by Defined Factors.” Cell Stem Cell , vol. 18, 2016, pp. 354-367.

Sample Abstract 4, a Structured Abstract

Reporting results about the effectiveness of antibiotic therapy in managing acute bacterial sinusitis, from a rigorously controlled study

Note: This journal requires authors to organize their abstract into four specific sections, with strict word limits. Because the headings for this structured abstract are self-explanatory, we have chosen not to add annotations to this sample abstract.

Wald, Ellen R., David Nash, and Jens Eickhoff. “Effectiveness of Amoxicillin/Clavulanate Potassium in the Treatment of Acute Bacterial Sinusitis in Children.” Pediatrics , vol. 124, no. 1, 2009, pp. 9-15.

“OBJECTIVE: The role of antibiotic therapy in managing acute bacterial sinusitis (ABS) in children is controversial. The purpose of this study was to determine the effectiveness of high-dose amoxicillin/potassium clavulanate in the treatment of children diagnosed with ABS.

METHODS : This was a randomized, double-blind, placebo-controlled study. Children 1 to 10 years of age with a clinical presentation compatible with ABS were eligible for participation. Patients were stratified according to age (<6 or ≥6 years) and clinical severity and randomly assigned to receive either amoxicillin (90 mg/kg) with potassium clavulanate (6.4 mg/kg) or placebo. A symptom survey was performed on days 0, 1, 2, 3, 5, 7, 10, 20, and 30. Patients were examined on day 14. Children’s conditions were rated as cured, improved, or failed according to scoring rules.

RESULTS: Two thousand one hundred thirty-five children with respiratory complaints were screened for enrollment; 139 (6.5%) had ABS. Fifty-eight patients were enrolled, and 56 were randomly assigned. The mean age was 6630 months. Fifty (89%) patients presented with persistent symptoms, and 6 (11%) presented with nonpersistent symptoms. In 24 (43%) children, the illness was classified as mild, whereas in the remaining 32 (57%) children it was severe. Of the 28 children who received the antibiotic, 14 (50%) were cured, 4 (14%) were improved, 4(14%) experienced treatment failure, and 6 (21%) withdrew. Of the 28children who received placebo, 4 (14%) were cured, 5 (18%) improved, and 19 (68%) experienced treatment failure. Children receiving the antibiotic were more likely to be cured (50% vs 14%) and less likely to have treatment failure (14% vs 68%) than children receiving the placebo.

CONCLUSIONS : ABS is a common complication of viral upper respiratory infections. Amoxicillin/potassium clavulanate results in significantly more cures and fewer failures than placebo, according to parental report of time to resolution.” (9)

Some Excellent Advice about Writing Abstracts for Basic Science Research Papers, by Professor Adriano Aguzzi from the Institute of Neuropathology at the University of Zurich:

Academic and Professional Writing

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How Many Sentences Are in a Paragraph, Really?

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Have you ever found yourself staring at a blank page, wondering if your paragraph is too short, too long, or just right? Well, you're not alone in asking how many sentences are in a paragraph . It can be hard to tell whether you've provided enough information and if, most importantly, it is easy to read and effectively communicates your main point.

There’s no magic number, but there are certain rules that writers can follow to create solid compositions.

Paragraph Structure 101

How many sentences are in a paragraph, can a paragraph be one sentence long, when to write shorter paragraphs, when to write longer paragraphs, nailing the final sentence, when is the right time to start a new paragraph, 5 tips for writing the perfect paragraph.

A paragraph is like a well-balanced meal, complete with a main idea, details to savor and a satisfying conclusion. This distinct section of writing deals with a particular idea or theme and typically consists of several sentences that are related and organized around a central point.

Here are the core components of a paragraph.

• Topic sentence : This is usually the first sentence of the paragraph, boldly introducing the main idea or point. It’s like the person at a party who starts the conversation with an exciting story, grabbing everyone’s attention.
• Supporting sentences : These sentences are the loyal friends who chime in with more details, explanations or examples to back up the main idea. Think of them as the friends who add, "So true, I saw that too!"
• Concluding sentence : This sentence wraps up the idea of the paragraph and may provide a transition to the next paragraph. It’s like the smooth talker at the end who sums up the moral of the story, leaving everyone satisfied and ready for the next tale.

There is no hard-and-fast rule regarding paragraph length. There is a time and a place for short paragraphs and their longer counterparts (we'll get to this later).

Determining the perfect number of sentences in a paragraph is more of an art than a science, but some helpful guidelines exist. Generally, a paragraph contains three to five sentences. This range ensures you have enough space to introduce your main idea, support it with details and wrap it up neatly — all without overwhelming your reader.

Breaking Down an Example

If you're writing about the benefits of exercise, your paragraph might start with a topic sentence like, "Exercise is crucial for maintaining good health."

Follow with a few supporting sentences like, "It improves cardiovascular health and strengthens muscles. In addition to the physical benefits, exercise also boosts mental well-being."

Then, finish with a strong closing sentence, "Incorporating regular exercise into your routine can lead to a happier, healthier life."

So, how many words are in an average paragraph? The typical range is 100 to 200 words. Think of this as a comfortable size for your reader to absorb. In academic writing, a paragraph might be on the longer side to thoroughly explore a concept, while in casual writing, shorter paragraphs keep things snappy and engaging.

Remember, these are guidelines, not rigid rules. The key is to balance clarity, completeness and reader engagement, making your paragraphs just the right length to keep readers or target audience hooked and informed.

It's common to assume that a good paragraph should be at least three or four sentences long, but that is not always the case. A paragraph can be one sentence, especially in certain contexts — like creative writing or journalism — or when emphasizing a particular point.

For example, "And then, silence," is a short, one-sentence paragraph often used for dramatic effect or to highlight a moment in the narrative. A short paragraph like this can be particularly effective when the previous paragraph is on the lengthy side.

In more formal or academic writing, paragraphs typically contain multiple sentences to develop an idea fully, but there are still some rare instances of single-sentence paragraphs. For example, "The experiment failed," is a one-sentence paragraph that can be used to highlight a significant result or conclusion.

Shorter paragraphs can be very effective in various contexts. For instance, they are useful for emphasizing a point, as a short paragraph can draw attention to a key idea or conclusion, making it stand out from the surrounding text. Think of it as the literary equivalent of a mic drop.

A brief paragraph in creative writing or storytelling can heighten suspense or emphasize a sudden change or revelation, such as "And then, the lights went out." It’s like the plot twist nobody saw coming.

Improving readability is another important reason to use shorter paragraphs. In web writing or other forms of media, shorter paragraphs can help keep the reader engaged and make the text easier to digest. Imagine serving your readers bite-sized snacks instead of a five-course meal.

Shorter paragraphs are also helpful for introducing a new idea. Starting a new section or shifting to a new idea with a short paragraph can provide a clear break and signal a transition to the reader. It's like saying, "Hold on, new topic ahead!"

Lastly, shorter paragraphs in blogs or informal writing can create a more conversational and approachable tone, making the content more engaging for the reader. Think of it as chatting with a friend rather than lecturing a class.

Sometimes, it's good to give your readers a break, so don't be afraid to keep it short and sweet!

Longer paragraphs are like a hearty stew: Sometimes, you need that extra depth and richness. They’re great for diving into complex topics where you must provide detailed explanations, multiple examples and robust support for your points. This is especially useful in academic writing, research papers and detailed reports where a brief overview just won't cut it.

In narrative writing, longer paragraphs allow you to set the scene, develop characters and advance the plot without stopping every few sentences.

When presenting a nuanced argument, longer paragraphs help articulate intricacies and counterpoints effectively, keeping the text from becoming a patchwork quilt of ideas. Just make sure they stay focused and clear so your readers don’t get lost in the wordy wilderness.

The secret to a solid final sentence lies in its ability to encapsulate the main idea of the paragraph and leave a lasting impression. It should provide a sense of closure, tying together the key points discussed. Using impactful language or a thought-provoking statement can make the final sentence memorable.

For example, a strong final sentence in a paragraph about climate change could be, "Our actions today will determine the planet's future — so maybe skip that extra-long shower."

In a discussion about healthy eating, you might conclude with, "Remember, an apple a day keeps the doctor away, but only if you actually eat it."

Knowing when to break into a new paragraph is key for clarity. Start a new paragraph when introducing a new idea or topic, when you need to break up a long block of text to improve readability or when you want to emphasize a point.

Transitioning between different speakers in dialogue also requires a new paragraph. Whenever your writing takes a new direction, think of it as a cue for a fresh paragraph.

These tips will help you craft clear, cohesive and compelling paragraphs.

• Stick to one core idea. Each paragraph should focus on a single core idea, in the same way that a good joke has one punchline. For example, if you're discussing the benefits of exercise, don't suddenly veer off into your favorite cookie recipes.
• Create connections between sentences. Make sure your sentences flow logically from one to the next. Think of it like a conga line: Each sentence should seamlessly follow the previous one, keeping the party going smoothly.
• Use transition words. Transition words and phrases — such as "however," "therefore" and "for example" — guide your reader through your argument and signaling shifts between ideas.
• Include supporting details. Bolster your main idea with supporting details, examples and evidence. Imagine you're trying to convince someone that pizza is the best food; you'll need to include tasty details like, "With its ooey-gooey mozzarella cheese, herbaceous marinara sauce and crisp pepperoni slices, piping-hot pizza is the perfect meal."
• Conclude with a strong closing sentence. Wrap up your paragraph with a concluding sentence that reinforces the main idea and provides a sense of closure. It's like the final chord in a song, leaving your reader with a satisfying sense of completeness.

Happy writing!

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