Compară metode

	Interviul Structurat	Interviul în profunzime	Sondaj
Domeniu	Metodologia anchetelor	Calitativ	Metodologia anchetelor
Familie	Process / pipeline	Process / pipeline	Process / pipeline
Anul apariției	1940s–1950s	Mid-20th century (formalised in qualitative social research from the 1950s onward)	Late 19th century; systematic social-science use from 1940s
Autorul original	Survey research tradition; formalized by Campbell, Katona, and Kahn in mid-20th century	Rooted in sociological interviewing traditions; systematised by researchers including Steinar Kvale and Herbert J. Rubin	Francis Galton, Charles Booth, and early social statisticians; formalised by Paul Lazarsfeld in the 1940s
Tip	Quantitative / mixed data collection technique	Qualitative research method	Quantitative (primarily) or mixed-methods data-collection instrument
Sursa seminală	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.	Kvale, S. (1996). InterViews: An Introduction to Qualitative Research Interviewing. Sage. ISBN: 978-0803958203	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
Denumiri alternative	standardized interview, formal interview, schedule-based interview, fixed-format interview	IDI, semi-structured interview, unstructured interview, qualitative interview	questionnaire survey, survey research, self-report survey, questionnaire study
Înrudite	4	6	6
Rezumat	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.	The in-depth interview is a one-to-one qualitative data-collection method in which a researcher engages a participant in an extended, open-ended conversation to elicit rich, detailed accounts of experiences, perceptions, beliefs, or meanings. Unlike structured surveys, the interview guide serves as a flexible road map rather than a fixed script, allowing the researcher to probe unexpected directions as they emerge. The approach is foundational to qualitative inquiry and is used directly as a primary method or as the data-collection arm of phenomenology, grounded theory, narrative analysis, and other frameworks.	A survey is a systematic data-collection method in which a standardised set of questions is posed to a sample of respondents to measure attitudes, behaviours, demographics, or other constructs. Surveys can be administered via paper, telephone, online platforms, or face-to-face. They are among the most widely used instruments in social, behavioural, health, and educational research because they can reach large, geographically dispersed samples at relatively low cost.