So sánh phương pháp

	Phân tích diễn ngôn phê phán theo chiều dọc	Phân tích chủ đề theo chiều dọc
Lĩnh vực	Định tính	Định tính
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1990s–2000s (CDA foundations ~1989–1992; longitudinal applications consolidated through 2000s)	2000s–2010s (formalized alongside longitudinal qualitative research methods)
Người khởi xướng	Norman Fairclough; Ruth Wodak	Built on Braun & Clarke (2006) thematic analysis; longitudinal adaptation developed across qualitative health and social science research communities
Loại	Qualitative longitudinal discourse design	Qualitative analysis approach
Công trình gốc	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.
Tên gọi khác	Longitudinal CDA, diachronic critical discourse analysis, longitudinal discourse study, temporal CDA	LTA, longitudinal TA, repeated thematic analysis, temporal thematic analysis
Liên quan	6	4
Tóm tắt	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.