手法を比較

	クリティカル・ケース・スタディ ― 戦略的単一ケース研究	批判的談話分析
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1980s–2006 (formalized)	Late 1970s–1990s (systematised ~1979–1995)
提唱者	Bent Flyvbjerg (formalized); Robert K. Yin (case study typology)	Norman Fairclough; Teun A. van Dijk; Ruth Wodak
種類	Qualitative research design	Qualitative research method
原典	Flyvbjerg, B. (2006). Five misunderstandings about case-study research. Qualitative Inquiry, 12(2), 219–245.	Fairclough, N. (1992). Discourse and Social Change. Polity Press.
別名	critical case, strategic case study, critical-instance case study, paradigmatic case study	CDA, Critical Linguistics, Discourse-Historical Approach, Dialectical-Relational Analysis
関連	6	6
概要	A critical case study is a case study design in which the researcher deliberately selects a case that is strategically important for testing, confirming, challenging, or extending an existing proposition, theory, or policy claim. Rather than choosing a typical or representative case, the researcher argues that if the finding holds here — in this most-likely, least-likely, or paradigmatic instance — it can reasonably be expected to hold more broadly. This purposive logic transforms a single case into a powerful analytical tool.	Critical Discourse Analysis (CDA) is a qualitative method that examines how language in texts and talk constructs, sustains, and challenges relations of power, ideology, and social inequality. Drawing on linguistics, social theory, and critical philosophy, CDA treats discourse not merely as communication but as social practice — a site where dominance is reproduced and where resistance can be articulated. Developed in the late twentieth century by Norman Fairclough, Teun van Dijk, and Ruth Wodak, among others, CDA is applied to political speeches, media texts, policy documents, educational materials, and institutional interactions.