手法を比較

	三角測量調査	フォーカスグループリサーチ
分野	調査方法論	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1978 (Denzin); widely operationalized in survey contexts from the 1990s onward	1940s (sociological origin); modern applied form from the 1980s–1990s
提唱者	Norman K. Denzin (triangulation concept); Alan Bryman (mixed-methods survey application)	Robert K. Merton (sociological precursor, 1940s); popularised in applied research by Richard A. Krueger
種類	Mixed-methods data collection design	Qualitative data collection method
原典	Denzin, N. K. (1978). The Research Act: A Theoretical Introduction to Sociological Methods (2nd ed.). McGraw-Hill.	Krueger, R.A. & Casey, M.A. (2014). Focus Groups: A Practical Guide for Applied Research (5th ed.). Sage. ISBN: 978-1483365244
別名	survey triangulation, multi-method survey, convergent survey design, cross-validated survey	focus group discussion, FGD, group interview, Odak Grup Araştırması
関連	5	6
概要	A Triangulated Survey deliberately combines a structured survey instrument with at least one additional data source — such as interviews, focus groups, observation, or a second survey — so that findings from each source can be cross-validated against the others. Rooted in Denzin's concept of methodological triangulation, the design strengthens credibility by checking whether independent lines of evidence converge on the same conclusions. It is especially common in applied social, educational, and health research.	Focus group research is a qualitative data-collection method in which a trained moderator guides structured discussions with homogeneous groups of six to ten participants to explore ideas, attitudes, and perceptions on a defined topic. Developed from sociological roots in the 1940s and systematised for applied research by Krueger and Casey, the method leverages group interaction as a data source — revealing not just what people think, but how they negotiate and articulate views in a social setting.