Cited by 1,636Qualitative Research Methods and ApplicationsFocus Groups and Qualitative MethodsQualitative Research Methods and Ethics

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Does Sample Size Matter in Qualitative Research?: A Review of Qualitative Interviews in is Research

Marshall, Bryan, Cardon, Peter, Poddar, Amit, Fontenot, Renee·2013·Journal of Computer Information Systems

DOI 10.1080/08874417.2013.11645667

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Abstract

This study examines 83 IS qualitative studies in leading IS journals for the following purposes: (a) identifying the extent to which IS qualitative studies employ best practices of justifying sample size; (b) identifying optimal ranges of interviews for various types of qualitative research; and (c) identifying the extent to which cultural factors (such as journal of publication, number of authors, world region) impact sample size of interviews. Little or no rigor for justifying sample size was shown for virtually all of the IS studies in this dataset. Furthermore, the number of interviews conducted for qualitative studies is correlated with cultural factors, implying the subjective nature of sample size in qualitative IS studies. Recommendations are provided for minimally acceptable practices of justifying sample size of interviews in qualitative IS studies.

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“Based on these findings, Marshall et al. (2013) recommended that, for a single case study, the number of interviewees should range between 15 and 30.”
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“Encoding large datasets manually requires multiple encoders and takes considerable time, which results in relatively small sample sizes (Marshall et al., 2013 ).”
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“Data collection cessation was informed by general qualitative sampling recommendations of 20 – 30 participants (Creswell & Poth, 2023; Marshall et al., 2013), information derived from similar empirical studies (Topkaya, 2015), and the data saturation concept developed by Glaser and Strauss (1999).”

Authors: Marshall, B., Cardon, P., Poddar, A., & Fontenot, R.
Affiliations: Georgia College & State University (US)
University of Southern California (US)
ORCID: Cardon, Peter
Poddar, Amit
Venue: Journal of Computer Information Systems
Publisher: Informa UK Limited
Published: 2013-09
Volume: 54
Issue: 1
Pages: 11-22
ISSN: 0887-4417 (ISSN-L)
2380-2057
DOI: 10.1080/08874417.2013.11645667
OpenAlex: W124963830
Cited by: 1,636
References: 0
Citations by year: 2026: 125 · 2025: 203 · 2024: 204 · 2023: 168 · 2022: 161 · 2021: 192 · 2020: 128 · 2019: 131 · 2018: 105 · 2017: 52 · 2016: 98 · 2015: 62 · 2014: 7
FWCI: 268.21
Type: journal article
Language: en
Open access: closed
Locations: Journal of Computer Information Systems (publishedVersion)
Topics: Social Sciences › Education › Qualitative Research Methods and Applications
Social Sciences › Sociology and Political Science › Focus Groups and Qualitative Methods
Social Sciences › Sociology and Political Science › Qualitative Research Methods and Ethics
Keywords: sample size justification, qualitative interviews, qualitative research rigor, information systems research, number of authors

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Does Sample Size Matter in Qualitative Research?: A Review of Qualitative Interviews in is Research

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