So sánh phương pháp

	Phỏng vấn phi cấu trúc	Dân tộc học	Nghiên cứu nhóm tập trung	Lý thuyết Nền tảng
Lĩnh vực	Định tính	Định tính	Định tính	Nghiên cứu định tính
Họ	Process / pipeline	Process / pipeline	Process / pipeline	Process / pipeline
Năm ra đời	Mid-20th century (Rogers ~1942; Spradley ~1979)	c. 1922 (Malinowski's Argonauts of the Western Pacific)	1940s (sociological origin); modern applied form from the 1980s–1990s	1967
Người khởi xướng	Rooted in anthropological and sociological fieldwork traditions; systematised by James P. Spradley and Carl Rogers (non-directive counselling interview)	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology	Robert K. Merton (sociological precursor, 1940s); popularised in applied research by Richard A. Krueger	Barney Glaser and Anselm Strauss
Loại	Qualitative research method	Qualitative fieldwork tradition	Qualitative data collection method	Method
Công trình gốc	Spradley, J. P. (1979). The Ethnographic Interview. Holt, Rinehart and Winston.	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462	Krueger, R.A. & Casey, M.A. (2014). Focus Groups: A Practical Guide for Applied Research (5th ed.). Sage. ISBN: 978-1483365244	Glaser, B. G., & Strauss, A. L. (1967). The discovery of grounded theory: Strategies for qualitative research. Aldine.
Tên gọi khác	open-ended interview, non-directive interview, in-depth interview, conversational interview	Etnografi, participant observation, fieldwork, ethnographic research	focus group discussion, FGD, group interview, Odak Grup Araştırması	GT, Grounded Theory Approach
Liên quan	6	5	6	3
Tóm tắt	An unstructured interview is a qualitative data-collection method in which the researcher enters the conversation with a broad topic or grand-tour question rather than a fixed questionnaire, allowing the participant to direct the flow and depth of the discussion. The approach prioritises the participant's own conceptual categories and narrative logic over the researcher's pre-formed agenda, making it especially powerful for exploratory inquiry into unfamiliar or complex social phenomena.	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.	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.	Grounded Theory (GT) is a systematic qualitative research methodology in which theory emerges directly from data through iterative analysis, rather than being imposed before data collection. Developed by Barney Glaser and Anselm Strauss in 1967, GT prioritizes generating explanatory frameworks grounded in evidence.