手法を比較

	Longitudinal Critical Discourse Analysis	Longitudinal Discourse Analysis
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1990s–2000s (CDA foundations ~1989–1992; longitudinal applications consolidated through 2000s)	1990s–2000s (systematised as a distinct approach)
提唱者	Norman Fairclough; Ruth Wodak	Norman Fairclough; Jan Blommaert; applied linguists in sociolinguistics and CDA traditions
種類	Qualitative longitudinal discourse design	Qualitative longitudinal research design
原典	Fairclough, N. (1992). Discourse and Social Change. Polity Press. ISBN: 978-0745612690	Fairclough, N. (2003). Analysing Discourse: Textual Analysis for Social Research. Routledge. ISBN: 978-0415258937
別名	Longitudinal CDA, diachronic critical discourse analysis, longitudinal discourse study, temporal CDA	LDA, diachronic discourse analysis, longitudinal CDA, discourse change analysis
関連	6	6
概要	Longitudinal Critical Discourse Analysis (LCDA) combines the critical discourse analysis tradition — which examines how language constructs and reproduces power, ideology, and social inequality — with a longitudinal design that collects and compares texts at multiple time points. By tracking discursive change over time, LCDA reveals how ideological representations, social identities, and power relations shift, stabilise, or are contested across different historical or political periods.	Longitudinal Discourse Analysis (LDA) is a qualitative research approach that examines how discourse — language in use, texts, talk, and representational practices — changes across time. Rather than analysing a single snapshot of language, LDA collects and compares discourse data at multiple points to uncover how meanings, identities, ideologies, or social practices evolve, stabilise, or shift under the influence of historical, institutional, or societal forces.