So sánh phương pháp

	Nghiên cứu nhóm tập trung	Nghiên cứu phương pháp hỗn hợp	Khảo sát trực tuyến
Lĩnh vực	Định tính	Định tính	Phương pháp luận khảo sát
Họ	Process / pipeline	Process / pipeline	Process / pipeline
Năm ra đời	1940s (sociological origin); modern applied form from the 1980s–1990s	—	Mid-1990s (widespread scholarly adoption ~1995–2000)
Người khởi xướng	Robert K. Merton (sociological precursor, 1940s); popularised in applied research by Richard A. Krueger	—	Mick P. Couper, Don A. Dillman (early systematic frameworks)
Loại	Qualitative data collection method	Research design framework	Quantitative / mixed-methods data collection technique
Công trình gốc	Krueger, R.A. & Casey, M.A. (2014). Focus Groups: A Practical Guide for Applied Research (5th ed.). Sage. ISBN: 978-1483365244	Creswell, J.W. & Plano Clark, V.L. (2018). Designing and Conducting Mixed Methods Research (3rd ed.). Sage. ISBN: 978-1483344379	Couper, M. P. (2000). Web surveys: A review of issues and approaches. Public Opinion Quarterly, 64(4), 464–494.
Tên gọi khác	focus group discussion, FGD, group interview, Odak Grup Araştırması	Karma Yöntem Araştırması (Mixed Methods), multi-method research, triangulation design	web survey, internet survey, e-survey, computer-assisted web interviewing
Liên quan	6	4	6
Tóm tắt	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.	Mixed methods research is a systematic research design in which quantitative and qualitative data are collected and analysed within a single study. Formalised by Creswell and Plano Clark (2003, 3rd ed. 2018), it offers three principal design variants — concurrent, sequential, and transformative — and strengthens findings through triangulation across both data strands.	An online survey is a structured data collection instrument hosted on a web platform and completed by respondents via internet-connected devices. It enables large-scale, geographically dispersed data gathering at low cost and with rapid turnaround. Respondents self-administer the questionnaire at their convenience, which reduces interviewer bias and permits automatic data capture. Online surveys are the dominant mode of survey research in social, behavioural, health, and market research today.