手法を比較

	超越現象学	ケーススタディリサーチ（Case Study Research）	談話分析
分野	質的手法	質的手法	質的研究
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1900–1913 (Ideas I, 1913)	1984 (seminal codification)	1989 (Fairclough); 1987 (Potter & Wetherell)
提唱者	Edmund Husserl	Robert K. Yin (systematised in Case Study Research, 1984)	Norman Fairclough; Jonathan Potter and Margaret Wetherell
種類	Qualitative research method	Qualitative research design	Method
原典	Moustakas, C. (1994). Phenomenological Research Methods. Sage. ISBN: 978-0803957466	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.
別名	Husserlian phenomenology, eidetic phenomenology, transcendental-phenomenological research, pure phenomenology	Vaka Çalışması (Case Study), case study design, case study methodology	DA, Critical Discourse Analysis, Discursive Analysis
関連	6	5	2
概要	Transcendental phenomenology, founded by Edmund Husserl, is a qualitative method that seeks the universal essential structures — the invariant essences — of a consciously lived experience. By bracketing all assumptions and prior theories (epoché) and applying eidetic reduction, the researcher uncovers what an experience is in its purest, most fundamental form, independent of any particular context, culture, or individual biography. Clark Moustakas's 1994 adaptation made the method directly accessible to social-science researchers.	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.