手法を比較

	長期的民族誌研究	ケーススタディリサーチ（Case Study Research）	エスノグラフィー
分野	質的手法	質的手法	質的手法
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1920s (classical origins); refined 1990s–2000s	1984 (seminal codification)	c. 1922 (Malinowski's Argonauts of the Western Pacific)
提唱者	Rooted in classical anthropological fieldwork (Malinowski, 1922); systematised for sociological revisits by Michael Burawoy (2003)	Robert K. Yin (systematised in Case Study Research, 1984)	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology
種類	Qualitative research design	Qualitative research design	Qualitative fieldwork tradition
原典	Burawoy, M. (2003). Revisits: An outline of a theory of reflexive ethnography. American Sociological Review, 68(5), 645–679.	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462
別名	extended ethnography, long-term fieldwork, sustained ethnographic study, longitudinal field research	Vaka Çalışması (Case Study), case study design, case study methodology	Etnografi, participant observation, fieldwork, ethnographic research
関連	5	5	5
概要	Longitudinal ethnography is a qualitative research design in which a researcher conducts sustained, repeated fieldwork with the same community, organisation, or group across an extended period — months to decades. By returning to the field at multiple time points, the researcher captures how social processes, meanings, and structures evolve, making it the only qualitative method capable of directly observing change and continuity in lived experience.	Case study research is a qualitative research design that investigates a specific phenomenon, individual, group, organisation, or event in depth within its real-world context. Systematised by Robert K. Yin in 1984, it supports single-case and multiple-case designs and draws on multiple data sources — interviews, observation, documents, and artefacts — to build a rich, contextualised account of a bounded unit.	Ethnography is a qualitative research tradition in which a researcher immerses themselves in a social group or community over an extended period — typically three to six months or longer — to study its culture, values, and behaviours in their natural setting. Originating in social and cultural anthropology, and consolidated as a rigorous method by Bronisław Malinowski in the early twentieth century, ethnography produces rich, contextualised accounts of how people live, work, and make meaning together.