手法を比較

	Longitudinal Critical Discourse Analysis	Longitudinal Qualitative Content 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)	2000s–2010s
提唱者	Norman Fairclough; Ruth Wodak	Philipp Mayring (foundational QCA); longitudinal extension developed across qualitative health and social research traditions
種類	Qualitative longitudinal discourse design	Qualitative analytical method
原典	Fairclough, N. (1992). Discourse and Social Change. Polity Press. ISBN: 978-0745612690	Mayring, P. (2000). Qualitative content analysis. Forum: Qualitative Social Research, 1(2), Art. 20.
別名	Longitudinal CDA, diachronic critical discourse analysis, longitudinal discourse study, temporal CDA	LQCA, longitudinal QCA, repeated qualitative content analysis, panel qualitative content analysis
関連	6	3
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 qualitative content analysis (LQCA) applies systematic content analysis to text data gathered from the same participants, settings, or documents at two or more points in time. The method preserves the interpretive rigour of qualitative content analysis while adding an explicit temporal dimension, enabling researchers to track how meanings, experiences, categories, or discourse shift, deepen, or stabilise across time rather than producing a single-point-in-time description.