手法を比較

	フィールドベース事例研究	参与観察
分野	質的手法	質的研究
系統	Process / pipeline	Process / pipeline
提唱年	1970s–1990s (formalized by Yin 1984, Stake 1995)	1922
提唱者	Robert Yin, Robert Stake (case study formalization); field-based tradition rooted in anthropological and sociological fieldwork	Bronislaw Malinowski
種類	Qualitative research design	Method
原典	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Geertz, C. (1973). The Interpretation of Cultures. Basic Books. ISBN: 978-0465026432
別名	fieldwork case study, naturalistic case study, in-situ case study, field case study	ethnographic observation, participatory observation, overt observation, immersive observation
関連	6	4
概要	A field-based case study is a qualitative research design that investigates a bounded phenomenon — a case — within its real-world, natural setting through sustained on-site data collection. Combining the analytical structure of case study methodology with the direct observational immersion of fieldwork, it enables rich, context-sensitive understanding of how phenomena unfold in practice. The approach is firmly grounded in the frameworks of Robert Yin and Robert Stake and draws on anthropological traditions of participant and non-participant observation.	Participant observation is a qualitative research method in which the researcher embeds themselves within a community, organization, or social setting for an extended period, engaging in the activities and relationships of the group while systematically observing and documenting behavior, interactions, and cultural meaning. Pioneered by Malinowski in the 1920s and developed in anthropology, the method has been adopted across sociology, education, health sciences, and organizational research. The researcher functions as both insider (participating in group activities) and outsider (maintaining analytical distance), generating thick description—rich accounts of context, behavior, and meaning that reveal how people actually live and interact.