So sánh phương pháp

	Phương pháp phỏng vấn chuyên sâu	Phương pháp nhóm tập trung
Lĩnh vực	Nghiên cứu định tính	Nghiên cứu định tính
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1954	1956
Người khởi xướng	Carl Rogers and Herbert H. Hyman	Robert K. Merton and Paul F. Lazarsfeld
Loại	Method	Method
Công trình gốc	Kvale, S. (1996). InterViews: An Introduction to Qualitative Research Interviewing. SAGE Publications. ISBN: 978-0761908631	Krueger, R. A. (1994). Focus Groups: A Practical Guide for Applied Research. SAGE Publications. ISBN: 978-0803954366
Tên gọi khác	IDI, qualitative interview, one-on-one interview, in-depth interviewing	FGD, focus group discussion, group interview
Liên quan	5	4
Tóm tắt	In-depth interviews are a qualitative research method in which a trained interviewer conducts one-on-one conversations with individual participants using open-ended questions to explore their experiences, perspectives, and understandings of a phenomenon. Developed in the 1950s by Rogers and Hyman, the method varies along a spectrum from structured (standardized question sets) to semi-structured (guided topic areas with flexibility) to unstructured (emergent, conversational). In-depth interviews are widely used in sociology, psychology, health sciences, anthropology, and organizational research to capture rich, detailed narratives and personal meaning.	Focus group discussions are a qualitative research method in which a trained moderator guides a small group (typically 6–12 participants) through structured or semi-structured discussion of a specific topic or product. Developed by Merton and Lazarsfeld in the 1950s for market research, focus groups are now widely used in health sciences, education, social sciences, and policy research. The method leverages group interaction to generate rich, contextual insights that individual interviews may not reveal.