مقایسهٔ روش‌ها

	تحلیل گفتمان طولی	قوم‌نگاری
حوزه	کیفی	کیفی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1990s–2000s (systematised as a distinct approach)	c. 1922 (Malinowski's Argonauts of the Western Pacific)
پدیدآور	Norman Fairclough; Jan Blommaert; applied linguists in sociolinguistics and CDA traditions	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology
نوع	Qualitative longitudinal research design	Qualitative fieldwork tradition
منبع بنیادین	Fairclough, N. (2003). Analysing Discourse: Textual Analysis for Social Research. Routledge. ISBN: 978-0415258937	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462
نام‌های دیگر	LDA, diachronic discourse analysis, longitudinal CDA, discourse change analysis	Etnografi, participant observation, fieldwork, ethnographic research
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.	Ethnography is a qualitative research tradition in which a researcher immerses themselves in a social group or community over an extended period — typically three to six months or longer — to study its culture, values, and behaviours in their natural setting. Originating in social and cultural anthropology, and consolidated as a rigorous method by Bronisław Malinowski in the early twentieth century, ethnography produces rich, contextualised accounts of how people live, work, and make meaning together.