So sánh phương pháp

	Phỏng vấn phi cấu trúc	Nghiên cứu nhóm tập trung
Lĩnh vực	Định tính	Định tính
Họ	Process / pipeline	Process / pipeline
Năm ra đời	Mid-20th century (Rogers ~1942; Spradley ~1979)	1940s (sociological origin); modern applied form from the 1980s–1990s
Người khởi xướng	Rooted in anthropological and sociological fieldwork traditions; systematised by James P. Spradley and Carl Rogers (non-directive counselling interview)	Robert K. Merton (sociological precursor, 1940s); popularised in applied research by Richard A. Krueger
Loại	Qualitative research method	Qualitative data collection method
Công trình gốc	Spradley, J. P. (1979). The Ethnographic Interview. Holt, Rinehart and Winston.	Krueger, R.A. & Casey, M.A. (2014). Focus Groups: A Practical Guide for Applied Research (5th ed.). Sage. ISBN: 978-1483365244
Tên gọi khác	open-ended interview, non-directive interview, in-depth interview, conversational interview	focus group discussion, FGD, group interview, Odak Grup Araştırması
Liên quan	6	6
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.	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.