مقایسهٔ روش‌ها

	تحلیل گفتمان طولی	تحلیل محتوا
حوزه	کیفی	کیفی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1990s–2000s (systematised as a distinct approach)	Systematised through Krippendorff's methodology work; 4th edition 2018
پدیدآور	Norman Fairclough; Jan Blommaert; applied linguists in sociolinguistics and CDA traditions	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research
نوع	Qualitative longitudinal research design	Qualitative / mixed-method research technique
منبع بنیادین	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
نام‌های دیگر	LDA, diachronic discourse analysis, longitudinal CDA, discourse change analysis	İçerik Analizi, systematic content coding, quantitative content analysis
مرتبط	6	5
خلاصه	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.