手法を比較

	Longitudinal Critical Discourse Analysis	時系列テーマ分析
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)	2000s–2010s (formalized alongside longitudinal qualitative research methods)
提唱者	Norman Fairclough; Ruth Wodak	Built on Braun & Clarke (2006) thematic analysis; longitudinal adaptation developed across qualitative health and social science research communities
種類	Qualitative longitudinal discourse design	Qualitative analysis approach
原典	Fairclough, N. (1992). Discourse and Social Change. Polity Press. ISBN: 978-0745612690	Braun, V., & Clarke, V. (2006). Using thematic analysis in psychology. Qualitative Research in Psychology, 3(2), 77–101.
別名	Longitudinal CDA, diachronic critical discourse analysis, longitudinal discourse study, temporal CDA	LTA, longitudinal TA, repeated thematic analysis, temporal thematic analysis
関連	6	4
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 Thematic Analysis (LTA) extends standard thematic analysis to data collected at multiple time points from the same participants or contexts. Rather than producing a single cross-sectional account, LTA maps how themes emerge, persist, transform, or disappear over time, enabling researchers to understand change, continuity, and process in qualitative terms. It is widely used in health, education, and social science research where lived experience unfolds over months or years.