So sánh phương pháp

	Thu thập dữ liệu khảo sát từ xa	Kỹ thuật Delphi	Khảo sát trực tuyến
Lĩnh vực	Phương pháp luận khảo sát	Phương pháp luận khảo sát	Phương pháp luận khảo sát
Họ	Process / pipeline	Process / pipeline	Process / pipeline
Năm ra đời	1970s–present (formalised by Dillman 1978; expanded to internet surveys 2000s)	1950s–1963	Mid-1990s (widespread scholarly adoption ~1995–2000)
Người khởi xướng	Don A. Dillman (Tailored Design Method for mail/remote surveys)	Norman Dalkey and Olaf Helmer (RAND Corporation)	Mick P. Couper, Don A. Dillman (early systematic frameworks)
Loại	Quantitative / mixed-methods data collection technique	Iterative expert consensus technique	Quantitative / mixed-methods data collection technique
Công trình gốc	Dillman, D. A., Smyth, J. D., & Christian, L. M. (2014). Internet, Phone, Mail, and Mixed-Mode Surveys: The Tailored Design Method (4th ed.). Wiley. ISBN: 978-1118456149	Dalkey, N., & Helmer, O. (1963). An experimental application of the Delphi method to the use of experts. Management Science, 9(3), 458–467.	Couper, M. P. (2000). Web surveys: A review of issues and approaches. Public Opinion Quarterly, 64(4), 464–494.
Tên gọi khác	distance survey, self-administered remote questionnaire, remote questionnaire, distributed survey	Delphi method, Delphi survey, expert consensus method, iterative expert panel	web survey, internet survey, e-survey, computer-assisted web interviewing
Liên quan	6	6	6
Tóm tắt	A remote survey is a structured data collection method in which respondents complete a questionnaire without the researcher being physically present. Delivered via mail, telephone, email, web platforms, or mobile apps, it enables researchers to reach geographically dispersed samples at relatively low cost. The method is central to social-science, public-health, and organisational research and is codified in Dillman's widely used Tailored Design Method.	The Delphi technique is a structured, multi-round data collection method that harvests and refines expert opinion through iterative questionnaires and controlled feedback. Developed at RAND Corporation in the 1950s, it is designed to converge a dispersed expert panel toward a reliable consensus on complex, uncertain, or future-oriented questions — without the conformity pressures of face-to-face group discussion.	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.