So sánh phương pháp

	Quan sát không tham gia	Phỏng vấn có cấu trúc
Lĩnh vực	Phương pháp luận khảo sát	Phương pháp luận khảo sát
Họ	Process / pipeline	Process / pipeline
Năm ra đời	Formalized mid-20th century (Gold 1958); practice dates to late 19th-century social surveys	1940s–1950s
Người khởi xướng	Raymond Gold (role typology); earlier roots in social survey movement and Chicago School sociology	Survey research tradition; formalized by Campbell, Katona, and Kahn in mid-20th century
Loại	Qualitative / quantitative observational data collection	Quantitative / mixed data collection technique
Công trình gốc	Gold, R. L. (1958). Roles in sociological field observations. Social Forces, 36(3), 217–223.	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	detached observation, systematic observation, structured field observation, external observation	standardized interview, formal interview, schedule-based interview, fixed-format interview
Liên quan	5	4
Tóm tắt	Non-participant observation is a data-collection method in which the researcher observes behavior, interactions, or events in a natural or structured setting without joining or influencing the activity under study. The observer maintains a deliberate distance from participants to minimize their own effect on the phenomena being recorded, producing field notes, behavioral tallies, or recordings that reflect naturally occurring behavior rather than behavior shaped by researcher involvement.	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.