手法を比較

	マルチソース非参加観察	文書収集
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1970s–1980s (methodological triangulation literature)	19th–20th century historical methods; contemporary social-science codification c. 2000s
提唱者	Rooted in systematic observation traditions; multi-source triangulation formalised by Norman Denzin	Rooted in historical and social science traditions; systematized by Lindsay Prior and Glenn Bowen
種類	Qualitative/naturalistic data collection strategy	Qualitative / mixed data-collection technique
原典	Denzin, N. K. (1978). The Research Act: A Theoretical Introduction to Sociological Methods (2nd ed.). McGraw-Hill.	Bowen, G. A. (2009). Document analysis as a qualitative research method. Qualitative Research Journal, 9(2), 27–40.
別名	multi-site non-participant observation, multi-context unobtrusive observation, non-reactive multi-source observation, triangulated non-participant observation	document analysis, documentary method, document review, secondary document analysis
関連	6	3
概要	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.	Document collection is a systematic data-collection technique in which the researcher gathers and reviews existing written, visual, or digital records — such as reports, meeting minutes, policies, letters, photographs, or institutional records — as primary or supplementary evidence. It is widely used in qualitative, historical, and mixed-methods research and can stand alone or complement interviews and observation.