What Influences Saturation? Estimating Sample Sizes in Focus Group Research

Saturation is commonly used to determine sample sizes in qualitative research, yet there is little guidance on what influences saturation. We aimed to assess saturation and identify parameters to estimate sample sizes for focus group studies in advance of data collection. We used two approaches to a...

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Vydáno v:Qualitative health research Ročník 29; číslo 10; s. 1483
Hlavní autoři: Hennink, Monique M, Kaiser, Bonnie N, Weber, Mary Beth
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 01.08.2019
Témata:
Adolescent
Adult
Clinical Coding - methods
Female
Focus Groups - methods
Humans
Male
Qualitative Research
Sample Size
Young Adult
saturation
USA
qualitative
focus group discussions
qualitative research
diabetes
sample size
methodology
ISSN:1049-7323
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Shrnutí:Saturation is commonly used to determine sample sizes in qualitative research, yet there is little guidance on what influences saturation. We aimed to assess saturation and identify parameters to estimate sample sizes for focus group studies in advance of data collection. We used two approaches to assess saturation in data from 10 focus group discussions. Four focus groups were sufficient to identify a range of new issues (code saturation), but more groups were needed to fully understand these issues (meaning saturation). Group stratification influenced meaning saturation, whereby one focus group per stratum was needed to identify issues; two groups per stratum provided a more comprehensive understanding of issues, but more groups per stratum provided little additional benefit. We identify six parameters influencing saturation in focus group data: study purpose, type of codes, group stratification, number of groups per stratum, and type and degree of saturation.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1049-7323
DOI:10.1177/1049732318821692