So sánh phương pháp

	Khảo sát trực diện	Khảo sát trực tuyến	Phỏng vấn có cấu trúc
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	1930s–1940s (systematic survey era)	Mid-1990s (widespread scholarly adoption ~1995–2000)	1940s–1950s
Người khởi xướng	Established practice formalised in survey methodology (Gallup, Likert, and others from the 1930s–1940s)	Mick P. Couper, Don A. Dillman (early systematic frameworks)	Survey research tradition; formalized by Campbell, Katona, and Kahn in mid-20th century
Loại	Quantitative / mixed-mode data collection	Quantitative / mixed-methods data collection technique	Quantitative / mixed data collection technique
Công trình gốc	Fowler, F. J. (2014). Survey Research Methods (5th ed.). Sage Publications. ISBN: 978-1452259000	Couper, M. P. (2000). Web surveys: A review of issues and approaches. Public Opinion Quarterly, 64(4), 464–494.	Fontana, A., & Frey, J. H. (2000). The interview: From structured questions to negotiated text. In N. K. Denzin & Y. S. Lincoln (Eds.), Handbook of Qualitative Research (2nd ed., pp. 645–672). Sage.
Tên gọi khác	personal interview survey, in-person survey, PAPI survey, door-to-door survey	web survey, internet survey, e-survey, computer-assisted web interviewing	standardized interview, formal interview, schedule-based interview, fixed-format interview
Liên quan	5	6	4
Tóm tắt	A face-to-face survey is a structured data collection method in which a trained interviewer meets respondents in person and administers a standardised questionnaire. The interviewer reads questions aloud, clarifies wording when permitted by protocol, and records answers — either on paper (PAPI) or a laptop/tablet (CAPI). This mode consistently achieves higher response rates and better data quality for complex or sensitive questionnaires than self-administered alternatives, and is the reference standard in large-scale population surveys.	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.	A structured interview is a data collection technique in which every participant is asked exactly the same pre-specified questions in the same order, using standardized wording. Because the interview schedule is fixed, responses across participants are directly comparable, enabling quantitative aggregation and statistical analysis. It sits at the most standardized end of the interview continuum, between the self-administered questionnaire and the semi-structured interview.