เปรียบเทียบวิธี

	การวิเคราะห์วาทกรรมตามช่วงเวลา	การวิเคราะห์เนื้อหา
สาขาวิชา	เชิงคุณภาพ	เชิงคุณภาพ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1990s–2000s (systematised as a distinct approach)	Systematised through Krippendorff's methodology work; 4th edition 2018
ผู้ริเริ่ม	Norman Fairclough; Jan Blommaert; applied linguists in sociolinguistics and CDA traditions	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research
ประเภท	Qualitative longitudinal research design	Qualitative / mixed-method research technique
แหล่งต้นตำรับ	Fairclough, N. (2003). Analysing Discourse: Textual Analysis for Social Research. Routledge. ISBN: 978-0415258937	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661
ชื่อเรียกอื่น	LDA, diachronic discourse analysis, longitudinal CDA, discourse change analysis	İçerik Analizi, systematic content coding, quantitative content analysis
ที่เกี่ยวข้อง	6	5
สรุป	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.	Content analysis is a systematic research technique for reducing text, visual, or media material into coded categories so that patterns can be counted, compared, and interpreted. Formalised by Klaus Krippendorff in his widely cited methodology textbook (latest edition 2018), the method sits at the boundary of qualitative and quantitative inquiry: it imposes structured, replicable coding on inherently meaning-laden material.