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Validity, reliability, and generalizability in qualitative research

Lawrence leung.

1 Department of Family Medicine, Queen's University, Kingston, Ontario, Canada

2 Centre of Studies in Primary Care, Queen's University, Kingston, Ontario, Canada

In general practice, qualitative research contributes as significantly as quantitative research, in particular regarding psycho-social aspects of patient-care, health services provision, policy setting, and health administrations. In contrast to quantitative research, qualitative research as a whole has been constantly critiqued, if not disparaged, by the lack of consensus for assessing its quality and robustness. This article illustrates with five published studies how qualitative research can impact and reshape the discipline of primary care, spiraling out from clinic-based health screening to community-based disease monitoring, evaluation of out-of-hours triage services to provincial psychiatric care pathways model and finally, national legislation of core measures for children's healthcare insurance. Fundamental concepts of validity, reliability, and generalizability as applicable to qualitative research are then addressed with an update on the current views and controversies.

Nature of Qualitative Research versus Quantitative Research

The essence of qualitative research is to make sense of and recognize patterns among words in order to build up a meaningful picture without compromising its richness and dimensionality. Like quantitative research, the qualitative research aims to seek answers for questions of “how, where, when who and why” with a perspective to build a theory or refute an existing theory. Unlike quantitative research which deals primarily with numerical data and their statistical interpretations under a reductionist, logical and strictly objective paradigm, qualitative research handles nonnumerical information and their phenomenological interpretation, which inextricably tie in with human senses and subjectivity. While human emotions and perspectives from both subjects and researchers are considered undesirable biases confounding results in quantitative research, the same elements are considered essential and inevitable, if not treasurable, in qualitative research as they invariable add extra dimensions and colors to enrich the corpus of findings. However, the issue of subjectivity and contextual ramifications has fueled incessant controversies regarding yardsticks for quality and trustworthiness of qualitative research results for healthcare.

Impact of Qualitative Research upon Primary Care

In many ways, qualitative research contributes significantly, if not more so than quantitative research, to the field of primary care at various levels. Five qualitative studies are chosen to illustrate how various methodologies of qualitative research helped in advancing primary healthcare, from novel monitoring of chronic obstructive pulmonary disease (COPD) via mobile-health technology,[ 1 ] informed decision for colorectal cancer screening,[ 2 ] triaging out-of-hours GP services,[ 3 ] evaluating care pathways for community psychiatry[ 4 ] and finally prioritization of healthcare initiatives for legislation purposes at national levels.[ 5 ] With the recent advances of information technology and mobile connecting device, self-monitoring and management of chronic diseases via tele-health technology may seem beneficial to both the patient and healthcare provider. Recruiting COPD patients who were given tele-health devices that monitored lung functions, Williams et al. [ 1 ] conducted phone interviews and analyzed their transcripts via a grounded theory approach, identified themes which enabled them to conclude that such mobile-health setup and application helped to engage patients with better adherence to treatment and overall improvement in mood. Such positive findings were in contrast to previous studies, which opined that elderly patients were often challenged by operating computer tablets,[ 6 ] or, conversing with the tele-health software.[ 7 ] To explore the content of recommendations for colorectal cancer screening given out by family physicians, Wackerbarth, et al. [ 2 ] conducted semi-structure interviews with subsequent content analysis and found that most physicians delivered information to enrich patient knowledge with little regard to patients’ true understanding, ideas, and preferences in the matter. These findings suggested room for improvement for family physicians to better engage their patients in recommending preventative care. Faced with various models of out-of-hours triage services for GP consultations, Egbunike et al. [ 3 ] conducted thematic analysis on semi-structured telephone interviews with patients and doctors in various urban, rural and mixed settings. They found that the efficiency of triage services remained a prime concern from both users and providers, among issues of access to doctors and unfulfilled/mismatched expectations from users, which could arouse dissatisfaction and legal implications. In UK, a care pathways model for community psychiatry had been introduced but its benefits were unclear. Khandaker et al. [ 4 ] hence conducted a qualitative study using semi-structure interviews with medical staff and other stakeholders; adopting a grounded-theory approach, major themes emerged which included improved equality of access, more focused logistics, increased work throughput and better accountability for community psychiatry provided under the care pathway model. Finally, at the US national level, Mangione-Smith et al. [ 5 ] employed a modified Delphi method to gather consensus from a panel of nominators which were recognized experts and stakeholders in their disciplines, and identified a core set of quality measures for children's healthcare under the Medicaid and Children's Health Insurance Program. These core measures were made transparent for public opinion and later passed on for full legislation, hence illustrating the impact of qualitative research upon social welfare and policy improvement.

Overall Criteria for Quality in Qualitative Research

Given the diverse genera and forms of qualitative research, there is no consensus for assessing any piece of qualitative research work. Various approaches have been suggested, the two leading schools of thoughts being the school of Dixon-Woods et al. [ 8 ] which emphasizes on methodology, and that of Lincoln et al. [ 9 ] which stresses the rigor of interpretation of results. By identifying commonalities of qualitative research, Dixon-Woods produced a checklist of questions for assessing clarity and appropriateness of the research question; the description and appropriateness for sampling, data collection and data analysis; levels of support and evidence for claims; coherence between data, interpretation and conclusions, and finally level of contribution of the paper. These criteria foster the 10 questions for the Critical Appraisal Skills Program checklist for qualitative studies.[ 10 ] However, these methodology-weighted criteria may not do justice to qualitative studies that differ in epistemological and philosophical paradigms,[ 11 , 12 ] one classic example will be positivistic versus interpretivistic.[ 13 ] Equally, without a robust methodological layout, rigorous interpretation of results advocated by Lincoln et al. [ 9 ] will not be good either. Meyrick[ 14 ] argued from a different angle and proposed fulfillment of the dual core criteria of “transparency” and “systematicity” for good quality qualitative research. In brief, every step of the research logistics (from theory formation, design of study, sampling, data acquisition and analysis to results and conclusions) has to be validated if it is transparent or systematic enough. In this manner, both the research process and results can be assured of high rigor and robustness.[ 14 ] Finally, Kitto et al. [ 15 ] epitomized six criteria for assessing overall quality of qualitative research: (i) Clarification and justification, (ii) procedural rigor, (iii) sample representativeness, (iv) interpretative rigor, (v) reflexive and evaluative rigor and (vi) transferability/generalizability, which also double as evaluative landmarks for manuscript review to the Medical Journal of Australia. Same for quantitative research, quality for qualitative research can be assessed in terms of validity, reliability, and generalizability.

Validity in qualitative research means “appropriateness” of the tools, processes, and data. Whether the research question is valid for the desired outcome, the choice of methodology is appropriate for answering the research question, the design is valid for the methodology, the sampling and data analysis is appropriate, and finally the results and conclusions are valid for the sample and context. In assessing validity of qualitative research, the challenge can start from the ontology and epistemology of the issue being studied, e.g. the concept of “individual” is seen differently between humanistic and positive psychologists due to differing philosophical perspectives:[ 16 ] Where humanistic psychologists believe “individual” is a product of existential awareness and social interaction, positive psychologists think the “individual” exists side-by-side with formation of any human being. Set off in different pathways, qualitative research regarding the individual's wellbeing will be concluded with varying validity. Choice of methodology must enable detection of findings/phenomena in the appropriate context for it to be valid, with due regard to culturally and contextually variable. For sampling, procedures and methods must be appropriate for the research paradigm and be distinctive between systematic,[ 17 ] purposeful[ 18 ] or theoretical (adaptive) sampling[ 19 , 20 ] where the systematic sampling has no a priori theory, purposeful sampling often has a certain aim or framework and theoretical sampling is molded by the ongoing process of data collection and theory in evolution. For data extraction and analysis, several methods were adopted to enhance validity, including 1 st tier triangulation (of researchers) and 2 nd tier triangulation (of resources and theories),[ 17 , 21 ] well-documented audit trail of materials and processes,[ 22 , 23 , 24 ] multidimensional analysis as concept- or case-orientated[ 25 , 26 ] and respondent verification.[ 21 , 27 ]

Reliability

In quantitative research, reliability refers to exact replicability of the processes and the results. In qualitative research with diverse paradigms, such definition of reliability is challenging and epistemologically counter-intuitive. Hence, the essence of reliability for qualitative research lies with consistency.[ 24 , 28 ] A margin of variability for results is tolerated in qualitative research provided the methodology and epistemological logistics consistently yield data that are ontologically similar but may differ in richness and ambience within similar dimensions. Silverman[ 29 ] proposed five approaches in enhancing the reliability of process and results: Refutational analysis, constant data comparison, comprehensive data use, inclusive of the deviant case and use of tables. As data were extracted from the original sources, researchers must verify their accuracy in terms of form and context with constant comparison,[ 27 ] either alone or with peers (a form of triangulation).[ 30 ] The scope and analysis of data included should be as comprehensive and inclusive with reference to quantitative aspects if possible.[ 30 ] Adopting the Popperian dictum of falsifiability as essence of truth and science, attempted to refute the qualitative data and analytes should be performed to assess reliability.[ 31 ]

Generalizability

Most qualitative research studies, if not all, are meant to study a specific issue or phenomenon in a certain population or ethnic group, of a focused locality in a particular context, hence generalizability of qualitative research findings is usually not an expected attribute. However, with rising trend of knowledge synthesis from qualitative research via meta-synthesis, meta-narrative or meta-ethnography, evaluation of generalizability becomes pertinent. A pragmatic approach to assessing generalizability for qualitative studies is to adopt same criteria for validity: That is, use of systematic sampling, triangulation and constant comparison, proper audit and documentation, and multi-dimensional theory.[ 17 ] However, some researchers espouse the approach of analytical generalization[ 32 ] where one judges the extent to which the findings in one study can be generalized to another under similar theoretical, and the proximal similarity model, where generalizability of one study to another is judged by similarities between the time, place, people and other social contexts.[ 33 ] Thus said, Zimmer[ 34 ] questioned the suitability of meta-synthesis in view of the basic tenets of grounded theory,[ 35 ] phenomenology[ 36 ] and ethnography.[ 37 ] He concluded that any valid meta-synthesis must retain the other two goals of theory development and higher-level abstraction while in search of generalizability, and must be executed as a third level interpretation using Gadamer's concepts of the hermeneutic circle,[ 38 , 39 ] dialogic process[ 38 ] and fusion of horizons.[ 39 ] Finally, Toye et al. [ 40 ] reported the practicality of using “conceptual clarity” and “interpretative rigor” as intuitive criteria for assessing quality in meta-ethnography, which somehow echoed Rolfe's controversial aesthetic theory of research reports.[ 41 ]

Food for Thought

Despite various measures to enhance or ensure quality of qualitative studies, some researchers opined from a purist ontological and epistemological angle that qualitative research is not a unified, but ipso facto diverse field,[ 8 ] hence any attempt to synthesize or appraise different studies under one system is impossible and conceptually wrong. Barbour argued from a philosophical angle that these special measures or “technical fixes” (like purposive sampling, multiple-coding, triangulation, and respondent validation) can never confer the rigor as conceived.[ 11 ] In extremis, Rolfe et al. opined from the field of nursing research, that any set of formal criteria used to judge the quality of qualitative research are futile and without validity, and suggested that any qualitative report should be judged by the form it is written (aesthetic) and not by the contents (epistemic).[ 41 ] Rolfe's novel view is rebutted by Porter,[ 42 ] who argued via logical premises that two of Rolfe's fundamental statements were flawed: (i) “The content of research report is determined by their forms” may not be a fact, and (ii) that research appraisal being “subject to individual judgment based on insight and experience” will mean those without sufficient experience of performing research will be unable to judge adequately – hence an elitist's principle. From a realism standpoint, Porter then proposes multiple and open approaches for validity in qualitative research that incorporate parallel perspectives[ 43 , 44 ] and diversification of meanings.[ 44 ] Any work of qualitative research, when read by the readers, is always a two-way interactive process, such that validity and quality has to be judged by the receiving end too and not by the researcher end alone.

In summary, the three gold criteria of validity, reliability and generalizability apply in principle to assess quality for both quantitative and qualitative research, what differs will be the nature and type of processes that ontologically and epistemologically distinguish between the two.

Source of Support: Nil.

Conflict of Interest: None declared.

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  • Roberta Heale 1 ,
  • Alison Twycross 2
  • 1 School of Nursing, Laurentian University , Sudbury, Ontario , Canada
  • 2 Faculty of Health and Social Care , London South Bank University , London , UK
  • Correspondence to : Dr Roberta Heale, School of Nursing, Laurentian University, Ramsey Lake Road, Sudbury, Ontario, Canada P3E2C6; rheale{at}laurentian.ca

https://doi.org/10.1136/eb-2015-102129

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Evidence-based practice includes, in part, implementation of the findings of well-conducted quality research studies. So being able to critique quantitative research is an important skill for nurses. Consideration must be given not only to the results of the study but also the rigour of the research. Rigour refers to the extent to which the researchers worked to enhance the quality of the studies. In quantitative research, this is achieved through measurement of the validity and reliability. 1

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Types of validity

The first category is content validity . This category looks at whether the instrument adequately covers all the content that it should with respect to the variable. In other words, does the instrument cover the entire domain related to the variable, or construct it was designed to measure? In an undergraduate nursing course with instruction about public health, an examination with content validity would cover all the content in the course with greater emphasis on the topics that had received greater coverage or more depth. A subset of content validity is face validity , where experts are asked their opinion about whether an instrument measures the concept intended.

Construct validity refers to whether you can draw inferences about test scores related to the concept being studied. For example, if a person has a high score on a survey that measures anxiety, does this person truly have a high degree of anxiety? In another example, a test of knowledge of medications that requires dosage calculations may instead be testing maths knowledge.

There are three types of evidence that can be used to demonstrate a research instrument has construct validity:

Homogeneity—meaning that the instrument measures one construct.

Convergence—this occurs when the instrument measures concepts similar to that of other instruments. Although if there are no similar instruments available this will not be possible to do.

Theory evidence—this is evident when behaviour is similar to theoretical propositions of the construct measured in the instrument. For example, when an instrument measures anxiety, one would expect to see that participants who score high on the instrument for anxiety also demonstrate symptoms of anxiety in their day-to-day lives. 2

The final measure of validity is criterion validity . A criterion is any other instrument that measures the same variable. Correlations can be conducted to determine the extent to which the different instruments measure the same variable. Criterion validity is measured in three ways:

Convergent validity—shows that an instrument is highly correlated with instruments measuring similar variables.

Divergent validity—shows that an instrument is poorly correlated to instruments that measure different variables. In this case, for example, there should be a low correlation between an instrument that measures motivation and one that measures self-efficacy.

Predictive validity—means that the instrument should have high correlations with future criterions. 2 For example, a score of high self-efficacy related to performing a task should predict the likelihood a participant completing the task.

Reliability

Reliability relates to the consistency of a measure. A participant completing an instrument meant to measure motivation should have approximately the same responses each time the test is completed. Although it is not possible to give an exact calculation of reliability, an estimate of reliability can be achieved through different measures. The three attributes of reliability are outlined in table 2 . How each attribute is tested for is described below.

Attributes of reliability

Homogeneity (internal consistency) is assessed using item-to-total correlation, split-half reliability, Kuder-Richardson coefficient and Cronbach's α. In split-half reliability, the results of a test, or instrument, are divided in half. Correlations are calculated comparing both halves. Strong correlations indicate high reliability, while weak correlations indicate the instrument may not be reliable. The Kuder-Richardson test is a more complicated version of the split-half test. In this process the average of all possible split half combinations is determined and a correlation between 0–1 is generated. This test is more accurate than the split-half test, but can only be completed on questions with two answers (eg, yes or no, 0 or 1). 3

Cronbach's α is the most commonly used test to determine the internal consistency of an instrument. In this test, the average of all correlations in every combination of split-halves is determined. Instruments with questions that have more than two responses can be used in this test. The Cronbach's α result is a number between 0 and 1. An acceptable reliability score is one that is 0.7 and higher. 1 , 3

Stability is tested using test–retest and parallel or alternate-form reliability testing. Test–retest reliability is assessed when an instrument is given to the same participants more than once under similar circumstances. A statistical comparison is made between participant's test scores for each of the times they have completed it. This provides an indication of the reliability of the instrument. Parallel-form reliability (or alternate-form reliability) is similar to test–retest reliability except that a different form of the original instrument is given to participants in subsequent tests. The domain, or concepts being tested are the same in both versions of the instrument but the wording of items is different. 2 For an instrument to demonstrate stability there should be a high correlation between the scores each time a participant completes the test. Generally speaking, a correlation coefficient of less than 0.3 signifies a weak correlation, 0.3–0.5 is moderate and greater than 0.5 is strong. 4

Equivalence is assessed through inter-rater reliability. This test includes a process for qualitatively determining the level of agreement between two or more observers. A good example of the process used in assessing inter-rater reliability is the scores of judges for a skating competition. The level of consistency across all judges in the scores given to skating participants is the measure of inter-rater reliability. An example in research is when researchers are asked to give a score for the relevancy of each item on an instrument. Consistency in their scores relates to the level of inter-rater reliability of the instrument.

Determining how rigorously the issues of reliability and validity have been addressed in a study is an essential component in the critique of research as well as influencing the decision about whether to implement of the study findings into nursing practice. In quantitative studies, rigour is determined through an evaluation of the validity and reliability of the tools or instruments utilised in the study. A good quality research study will provide evidence of how all these factors have been addressed. This will help you to assess the validity and reliability of the research and help you decide whether or not you should apply the findings in your area of clinical practice.

  • Lobiondo-Wood G ,
  • Shuttleworth M
  • ↵ Laerd Statistics . Determining the correlation coefficient . 2013 . https://statistics.laerd.com/premium/pc/pearson-correlation-in-spss-8.php

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Competing interests None declared.

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Psychometric Evaluation of the Persian Version of Spiritual Self-Care Practice Scale in Iranian Patients with Cancer

  • ORIGINAL PAPER
  • Published: 28 May 2024

Cite this article

validity and reliability in qualitative and quantitative research pdf

  • Asma Najmadini   ORCID: orcid.org/0009-0005-5779-2402 1 ,
  • Alireza Malakoutikhah   ORCID: orcid.org/0000-0002-0708-0029 1 ,
  • Xu Tian   ORCID: orcid.org/0000-0002-3275-8751 2 ,
  • Mansooreh Azizzadeh Forouzi   ORCID: orcid.org/0000-0002-0338-7226 3 ,
  • Bander Balkhi   ORCID: orcid.org/0000-0003-3801-5497 4 &
  • Mahlagha Dehghan   ORCID: orcid.org/0000-0002-4205-829X 5  

Spiritual self-care is defined as a set of patient-centered or family-centered spiritual activities aimed at promoting health and well-being. In chronic diseases such as cancer, the responsibility for care typically falls on the patient or their family, necessitating an accurate assessment of the patient’s self-care practices to achieve this goal. The objective of this study was to translate, culturally adapt, and examine the psychometrics of the Persian version of the spiritual self-care practice scale (SSCPS) in cancer patients. This scale is designed to be administered directly to patients to assess their spiritual self-care practices. This cross-sectional study was conducted at the oncology ward in Afzalipoor Hospital, Javad Al-Aemeh Clinic, and Physicians Clinics affiliated with Kerman University of Medical Sciences in Kerman, southeast Iran. The study included qualitative and quantitative assessments of face validity, content validity, item analysis, exploratory and confirmatory factor analysis (construct validity), and reliability. Data collection took place between March 20, 2023, and December 30, 2023. The scale’s content validity index was calculated to be 0.948, with mostly minor revision comments for most items. The item-content validity indices ranged from 0.7 to 1. Exploratory factor analysis revealed a five-factor solution with 23 items, explaining 61.251% of the total variance. The identified factors were labeled as ‘personal and interpersonal spiritual practices,’ ‘shaping and strengthening relationship practices,’ ‘religious practices,’ ‘physical spiritual practices,’ and ‘reshaping relationship practices.’ Most of the confirmatory factor analysis indices were satisfactory ( χ 2 / df  = 1.665, CFI = 0.934, IFI = 0.935, RMSEA = 0.058). The Cronbach’s α coefficient for the total scale was 0.89, while it ranged from 0.596 to 0.882 for the subscales. The Persian version of SSCPS with 23 items demonstrates reliability and effectiveness in assessing the spiritual practice performance of Iranian cancer patients. Compared to the original version, the Persian adaptation of SSCPS is concise, making it a suitable instrument for future research and practice on spiritual self-care among Iranian cancer patients.

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Acknowledgments

We extend our gratitude to all participants who contributed to this study, as well as the invaluable support and collaboration from Kerman University of Medical Sciences, Kerman, Iran (Project No: 401000414). In addition, this work was supported by the Researchers Supporting Project number (RSP2024R76), King Saud University, Riyadh, Saudi Arabia.

The funding body did not play a role in the study's design or in the collection, analysis, or interpretation of data.

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Nursing Research Center, Kerman University of Medical Sciences, Kerman, Iran

Asma Najmadini & Alireza Malakoutikhah

Division of Science & Technology and Foreign Affairs, Chongqing Traditional Chinese Medicine Hospital, Chongqing, China

Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran

Mansooreh Azizzadeh Forouzi

Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia

Bander Balkhi

Reproductive Health, Family and Population Research Center, Kerman University of Medical Sciences, Kerman, Iran

Mahlagha Dehghan

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MD designed the study. AN, AM, XT, MAF, and BB conducted the search and data collection. MD analyzed data collection. MD, AN, AM and XT drafted the manuscript. MD, MAF, and BB revised the manuscript. All the authors read and approved the final manuscript.

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Najmadini, A., Malakoutikhah, A., Tian, X. et al. Psychometric Evaluation of the Persian Version of Spiritual Self-Care Practice Scale in Iranian Patients with Cancer. J Relig Health (2024). https://doi.org/10.1007/s10943-024-02066-9

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Understanding Reliability and Validity in Qualitative Research

Profile image of Lars Bradley

The Qualitative Report

The use of reliability and validity are common in quantitative research and now it is reconsidered in the qualitative research paradigm. Since reliability and validity are rooted in positivist perspective then they should be redefined for their use in a naturalistic approach. Like reliability and validity as used in quantitative research are providing springboard to examine what these two terms mean in the qualitative research paradigm, triangulation as used in quantitative research to test the reliability and validity can also illuminate some ways to test or maximize the validity and reliability of a qualitative study. Therefore, reliability, validity and triangulation, if they are relevant research concepts, particularly from a qualitative point of view, have to be redefined in order to reflect the multiple ways of establishing truth.

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Ana Trujillo Zapata

validity and reliability in qualitative and quantitative research pdf

Evidence-based nursing

Helen Noble

Deepak P Kafle

In general practice, qualitative research contributes as significantly as quantitative research and both try to find the same result; the truth. Qualitative research, also known as naturalistic inquiry, evolved inside the social and human sciences refers to theories on interpretation and human experience. The use of validity and reliability are common in quantitative research and currently, there are ongoing debates regarding whether the terms are appropriate to evaluate qualitative studies. Although there is no universally typical terminology and standards used to measure qualitative studies, all qualitative researchers comprise strategies to enhance the credibility of a study throughout the research design and implementation. The main aim of this article is to provide the concepts of validity and reliability and to ascertain that it is possible for qualitative research to be properly valid or reliable.

Mohammed Ali Bapir

With reference to definitions of validity and reliability, and drawing extensively on conceptualisations of qualitative research, this essay examines the correlation between the reliability of effort to find answers to questions about the social world, and the validity of conclusions drawn from such attempts. This is to point out the fundamental position to the role of theory in relation to research; as an inductivist strategy qualitative research tries to confer the correspondence between reality and representation. The problem of validity and reliability in qualitative research is entwined with the definition of qualitative research and the possibility to mirror this in practice to make a qualitative research properly valid and reliable. That presents both challenges and chances to qualitative researchers; yet, with taking into consideration qualitative criteria in social research, achieving validity and as well as reliability in qualitative research is not impossible.

Academia Letters

Anjali Yadav

The idea of reliability in research refers to the repetition or reinforcements of the degree of findings given under the same experiment condition performed by the other researchers and thus leading a wider research community to accept the proposed generalizations. Reliability being the more often quoted part of quantitative research ensures and plays a vital part in guaranteeing the credibility of the qualitative research because not only it tests the integrity of the researcher but also has a wide and direct implication when incorporated in practice. This research paper attempts to highlight the problems associated with the understatement of reliability in qualitative research, its appropriateness, and ways through which it can attain more credible status at par with quantitative research. KEYWORDS: Reliability, Qualitative Research, Construct, Quantitative

The idea of reliability in research refers to the repetition or reinforcements of the degree of findings given under the same experiment condition performed by the other researchers and thus leading a wider research community to accept the proposed generalizations. Reliability being the more often quoted part of quantitative research ensures and plays a vital part in guaranteeing the credibility of the qualitative research because not only it tests the integrity of the researcher but also has a wide and direct implication when incorporated in practice. This research paper attempts to highlight the problems associated with the understatement of reliability in qualitative research, its appropriateness and ways through which it can attain more credible status at par with quantitative research.

Dr Muhammad Azeem

Curriculum Inquiry

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Philip Dlamini

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  1. (PDF) Validity and Reliability in Qualitative Research

    Validity and reliability or trustworthiness are fundamental issues in scientific research whether qualitative, quantitative, or mixed research. It is a necessity for researchers to describe which ...

  2. PDF Issues of validity and reliability in qualitative research

    the validity and reliability of quantitative research cannot be applied to qualitative research, there are ongoing debates about whether terms such as validity, reliability and generalisability are appropriate to evalu-ate qualitative research.2-4 In the broadest context these terms are applicable, with validity referring to the integ-

  3. Quantitative Research Excellence: Study Design and Reliable and Valid

    Quantitative Research Excellence: Study Design and Reliable and Valid Measurement of Variables ... Critical Analysis of Reliability and Validity in Literature Reviews. Go to citation Crossref Google Scholar Pub Med. ... Quantitative Research for the Qualitative Researcher. 2014. SAGE Knowledge. Book chapter . Issues in Validity and Reliability.

  4. Understanding Reliability and Validity in Qualitative Research

    Kirk and Miller (1986) identify three types of reliability referred to in quantitative research, which relate to: (1) the degree to which a measurement, given repeatedly, remains the same (2) the stability of a measurement over time; and (3) the similarity of measurements within. a given time period (pp. 41-42).

  5. (PDF) Validity and reliability in qualitative research

    Validity is the extent to which a study accurately measures what it intends to measure, while reliability refers to the consistency and stability of the results (Kimberlin & Winterstein, 2008 ...

  6. Validity, reliability, and generalizability in qualitative research

    Validity, reliability, and generalizability in qualitative research. In general practice, qualitative research contributes as significantly as quantitative research, in particular regarding psycho-social aspects of patient-care, health services provision, policy setting, and health administrations. In contrast to quantitative research ...

  7. PDF John WCreswell D a lle Determining Validity n Qualitative Inquiry

    to traditional, quantitative studies. In quantitative research, investigators are most concerned about the specific inferences made from test scores on psychometric instruments (i.e., the construct, criterion, and content validity of inter-pretations of scores) (AERA, APA, & NCME, 1982) and the internal and external validity of experimental

  8. Verification Strategies for Establishing Reliability and Validity in

    Verificationis the process of checking, confirming, making sure, and being certain. In qualitative research, verification refers to the mechanisms used during the process of research to incrementally contribute to ensuring reliability and validity and, thus, the rigor of a study.

  9. PDF Issues of validity and reliability in qualitative research

    Although the tests and measures used to establish the validity and reliability of quantitative research cannot be applied to qualitative research, there are ongoing debates about whether terms such as validity, reliability and generalisability are appropriate to evaluate qualitative research. 2,3,4 . In the broadest context these terms

  10. Issues of validity and reliability in qualitative research

    Although the tests and measures used to establish the validity and reliability of quantitative research cannot be applied to qualitative research, there are ongoing debates about whether terms such as validity, reliability and generalisability are appropriate to evaluate qualitative research.2-4 In the broadest context these terms are applicable, with validity referring to the integrity and ...

  11. Verification Strategies for Establishing Reliability and Validity in

    Without rigor, research is worthless, becomes fiction, and loses its utility. Hence, a great deal of attention is applied to reliability and validity in all research methods. Challenges to rigor in qualitative inquiry interestingly paralleled the blossoming of statistical packages and the development of computing systems in quantitative research.

  12. PDF Validity and reliability in quantitative studies

    the studies. In quantitative research, this is achieved through measurement of the validity and reliability.1 Validity Validity is defined as the extent to which a concept is accurately measured in a quantitative study. For example, a survey designed to explore depression but which actually measures anxiety would not be consid-ered valid.

  13. Validity in Qualitative Research: A Processual Approach

    Validity in Qualitative Research: A Processual Approach . Abstract . Validity and reliability of research and its results are important elements to provide evidence of the quality of research in the organizational field. However, validity is better evidenced in quantitative studies than in qualitative research studies.

  14. PDF Two Criteria for Good Measurements in Research: Validity and Reliability

    The aim of this study is to discuss the aspects of reliability and validity in research. The objectives of this research are: • To indicate the errors the researchers often face. • To show the reliability in a research. • To highlight validity in a research. 4. Methodology

  15. [PDF] Issues of validity and reliability in qualitative research

    Issues of validity and reliability in qualitative research. H. Noble, Joanna Smith. Published in Evidence-Based Nursing 4 February 2015. Medicine. TLDR. Rigour, or the integrity in which a study is conducted, is outlined and concepts such as reliability, validity and generalisability typically associated with quantitative research and ...

  16. Validity and Reliability in Qualitative Research

    Mohammed Ali Bapir. 2012. With reference to definitions of validity and reliability, and drawing extensively on conceptualisations of qualitative research, this essay examines the correlation between the reliability of effort to find answers to questions about the social world, and the validity of conclusions drawn from such attempts.

  17. Validity and reliability in quantitative studies

    Validity. Validity is defined as the extent to which a concept is accurately measured in a quantitative study. For example, a survey designed to explore depression but which actually measures anxiety would not be considered valid. The second measure of quality in a quantitative study is reliability, or the accuracy of an instrument.In other words, the extent to which a research instrument ...

  18. PDF A modified persian version of the self-stigma of depression scale among

    Face and content validity In the qualitative face validity, 3 items were modified, and in the qualitative content validity, 2 items were modi-fied. The rates of CVR and CVI for all items of SSDS were 0.773 and 0.923, respectively. CFA section In the first model, all items of SSDS were survey, and factor loading of two items (item 3 and item 12) was

  19. Psychometric Evaluation of the Persian Version of Spiritual ...

    The study included qualitative and quantitative assessments of face validity, content validity, item analysis, exploratory and confirmatory factor analysis (construct validity), and reliability. Data collection took place between March 20, 2023, and December 30, 2023.

  20. PDF Validity, reliability, and generalizability in qualitative research

    Reliability In quantitative research, reliability refers to exact replicability of the processes and the results. In qualitative research with diverse paradigms, such definition of reliability is challenging and epistemologically counter‑intuitive. Hence, the essence of reliability for qualitative research lies with consistency.[24,28]

  21. Transferability and Generalization in Qualitative Research

    Schofield (1990, p. 202) states that qualitative research texts in the 1980s "paid little attention" to the question of generalization. For example, she notes that external validity was minimally addressed in Kirk and Miller's monograph addressing validity in qualitative research and in Berg's methods text. She summarizes that this was ...

  22. Exploring AI-mediated informal digital learning of English (AI-IDLE): a

    Reliability/validity checks The reliability and validity of the TAM scale were examined to see if the dataset satisfies the underlying assumptions for performing advanced sta-tistical tests. The Cronbach's α values of the four TAM variables were .76 (PEU), .83 (PU), .86 (IU), and .80 (AU) respectively, which were all

  23. (PDF) Understanding Reliability and Validity in Qualitative Research

    The use of reliability and validity are common in quantitative research and now it is reconsidered in the qualitative research paradigm. Since reliability and validity are rooted in positivist perspective then they should be redefined for their use in a naturalistic approach. Like reliability and validity as used in quantitative research are ...

  24. Short Sea Shipping as a Sustainable Modal Alternative: Qualitative and

    This study investigated the possibility of using short sea shipping (SSS) as a sustainable freight modal alternative by analyzing data collected from shippers in the New York State Capital Region. To this end, qualitative and quantitative approaches were jointly used. The qualitative analysis focused on exploring in-depth interviews with the decision makers regarding the drivers and the ...

  25. Intelligent Tutor: Leveraging ChatGPT and Microsoft Copilot Studio to

    Criterion-related Validity: The questionnaire results are compared with the outcomes of other measurement tools to validate the questionnaire's validity. In this study, the following methods were used for reliability and validity analysis: Test-retest Reliability: A test was conducted on 20 students twice, and the results showed a test-