手法を比較

	三角測量による非参加観察	マルチソース非参加観察
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1958 (observer roles); 1978 (triangulation applied to observation)	1970s–1980s (methodological triangulation literature)
提唱者	Norman K. Denzin (triangulation framework); Raymond Gold (observer roles taxonomy)	Rooted in systematic observation traditions; multi-source triangulation formalised by Norman Denzin
種類	Qualitative data collection technique	Qualitative/naturalistic data collection strategy
原典	Denzin, N. K. (1978). The Research Act: A Theoretical Introduction to Sociological Methods (2nd ed.). McGraw-Hill.	Denzin, N. K. (1978). The Research Act: A Theoretical Introduction to Sociological Methods (2nd ed.). McGraw-Hill.
別名	triangulated observation, multi-source non-participant observation, observational triangulation, observer triangulation	multi-site non-participant observation, multi-context unobtrusive observation, non-reactive multi-source observation, triangulated non-participant observation
関連	3	6
概要	Triangulated non-participant observation systematically combines two or more independent non-participant observation streams — using multiple observers, different time points, or distinct vantage points — to cross-validate field records of naturally occurring behaviour. The researcher remains outside the setting as a detached observer, and triangulation across sources reduces single-observer bias while strengthening the credibility of descriptive findings.	Multi-source non-participant observation is a qualitative data collection strategy in which a researcher systematically observes naturally occurring behaviour across two or more distinct settings, sites, or data sources without joining or influencing the activity being studied. By deliberately excluding the researcher from participation and drawing on multiple independent observational vantage points, the approach strengthens credibility through methodological triangulation while preserving the unobtrusiveness that protects naturalistic behaviour.