So sánh phương pháp

	Longitudinal Discourse Analysis	Phân tích Diễn ngôn Phê phán
Lĩnh vực	Định tính	Định tính
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1990s–2000s (systematised as a distinct approach)	Late 1970s–1990s (systematised ~1979–1995)
Người khởi xướng	Norman Fairclough; Jan Blommaert; applied linguists in sociolinguistics and CDA traditions	Norman Fairclough; Teun A. van Dijk; Ruth Wodak
Loại	Qualitative longitudinal research design	Qualitative research method
Công trình gốc	Fairclough, N. (2003). Analysing Discourse: Textual Analysis for Social Research. Routledge. ISBN: 978-0415258937	Fairclough, N. (1992). Discourse and Social Change. Polity Press.
Tên gọi khác	LDA, diachronic discourse analysis, longitudinal CDA, discourse change analysis	CDA, Critical Linguistics, Discourse-Historical Approach, Dialectical-Relational Analysis
Liên quan	6	6
Tóm tắt	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.	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.