手法を比較

	対面フォーカスグループ	構造化面接
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1940s (Merton & Lazarsfeld); systematised 1980s–1990s	1940s–1950s
提唱者	Robert K. Merton and Paul Lazarsfeld (focused interview); Richard Krueger and David Morgan (applied focus group methodology)	Survey research tradition; formalized by Campbell, Katona, and Kahn in mid-20th century
種類	Qualitative group data-collection technique	Quantitative / mixed data collection technique
原典	Krueger, R. A., & Casey, M. A. (2015). Focus Groups: A Practical Guide for Applied Research (5th ed.). Sage Publications. ISBN: 978-1483365244	Fontana, A., & Frey, J. H. (2000). The interview: From structured questions to negotiated text. In N. K. Denzin & Y. S. Lincoln (Eds.), Handbook of Qualitative Research (2nd ed., pp. 645–672). Sage.
別名	in-person focus group, FGD, co-located focus group, face-to-face FGD	standardized interview, formal interview, schedule-based interview, fixed-format interview
関連	5	4
概要	A face-to-face focus group is a structured, moderated group discussion conducted in a shared physical space, typically with 6–10 participants who are selected because they share a relevant characteristic. The moderator follows a semi-structured topic guide to elicit opinions, perceptions, and experiences. Unlike surveys, focus groups capture social interaction — agreement, disagreement, and the group dynamics through which attitudes are formed and expressed.	A structured interview is a data collection technique in which every participant is asked exactly the same pre-specified questions in the same order, using standardized wording. Because the interview schedule is fixed, responses across participants are directly comparable, enabling quantitative aggregation and statistical analysis. It sits at the most standardized end of the interview continuum, between the self-administered questionnaire and the semi-structured interview.