مقایسهٔ روش‌ها

	پژوهش گروه کانونی	پژوهش مطالعه موردی	قوم‌نگاری
حوزه	کیفی	کیفی	کیفی
خانواده	Process / pipeline	Process / pipeline	Process / pipeline
سال پیدایش	1940s (sociological origin); modern applied form from the 1980s–1990s	1984 (seminal codification)	c. 1922 (Malinowski's Argonauts of the Western Pacific)
پدیدآور	Robert K. Merton (sociological precursor, 1940s); popularised in applied research by Richard A. Krueger	Robert K. Yin (systematised in Case Study Research, 1984)	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology
نوع	Qualitative data collection method	Qualitative research design	Qualitative fieldwork tradition
منبع بنیادین	Krueger, R.A. & Casey, M.A. (2014). Focus Groups: A Practical Guide for Applied Research (5th ed.). Sage. ISBN: 978-1483365244	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462
نام‌های دیگر	focus group discussion, FGD, group interview, Odak Grup Araştırması	Vaka Çalışması (Case Study), case study design, case study methodology	Etnografi, participant observation, fieldwork, ethnographic research
مرتبط	6	5	5
خلاصه	Focus group research is a qualitative data-collection method in which a trained moderator guides structured discussions with homogeneous groups of six to ten participants to explore ideas, attitudes, and perceptions on a defined topic. Developed from sociological roots in the 1940s and systematised for applied research by Krueger and Casey, the method leverages group interaction as a data source — revealing not just what people think, but how they negotiate and articulate views in a social setting.	Case study research is a qualitative research design that investigates a specific phenomenon, individual, group, organisation, or event in depth within its real-world context. Systematised by Robert K. Yin in 1984, it supports single-case and multiple-case designs and draws on multiple data sources — interviews, observation, documents, and artefacts — to build a rich, contextualised account of a bounded unit.	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.