Critical factors in the determination of focus group size

Fam Pract. 1995 Dec;12(4):474-5. doi: 10.1093/fampra/12.4.474.

Abstract

From a theoretical perspective, it is difficult to decide an optimal number of participants that should be included in a focus group. Despite recent attempts, critical factors for the determination of the size of a focus group remain uncertain and can further be elaborated. From a practical perspective, this paper proposes four other factors that can be used for the determination of focus group size. These are: the number of questions asked, the allotted time for each question, the format of the focus group session and the duration of the session. Above all, the size of a group should first be determined by the aims of the research study.

Publication types

  • Review

MeSH terms

  • Focus Groups / methods*
  • Group Processes
  • Guidelines as Topic
  • Humans
  • Patient Selection*
  • Research Design*
  • Sample Size*
  • Time Factors