手法を比較

	ケーススタディリサーチ（Case Study Research）	談話分析	エスノグラフィー
分野	質的手法	質的研究	質的手法
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1984 (seminal codification)	1989 (Fairclough); 1987 (Potter & Wetherell)	c. 1922 (Malinowski's Argonauts of the Western Pacific)
提唱者	Robert K. Yin (systematised in Case Study Research, 1984)	Norman Fairclough; Jonathan Potter and Margaret Wetherell	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology
種類	Qualitative research design	Method	Qualitative fieldwork tradition
原典	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Fairclough, N. (1989). Language and power. Longman.	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462
別名	Vaka Çalışması (Case Study), case study design, case study methodology	DA, Critical Discourse Analysis, Discursive Analysis	Etnografi, participant observation, fieldwork, ethnographic research
関連	5	2	5
概要	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.	Discourse analysis is a qualitative research methodology that examines how language, communication, and power shape meaning, identity, and social reality. Developed across linguistics, sociology, and psychology (particularly by Norman Fairclough and Jonathan Potter), discourse analysis goes beyond content to analyze language use as a social practice that constitutes and reflects power relations, ideologies, and social structures.	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.