Compara mètodes

	Entrevista estructurada	Entrevista semiestructurada	Enquesta
Camp	Metodologia d'enquestes	Qualitativa	Metodologia d'enquestes
Família	Process / pipeline	Process / pipeline	Process / pipeline
Any d'origen	1940s–1950s	1946 (Merton & Kendall); codified as a standard method through the 1980s–1990s	Late 19th century; systematic social-science use from 1940s
Autor original	Survey research tradition; formalized by Campbell, Katona, and Kahn in mid-20th century	Robert K. Merton and Patricia Kendall (focused interview, 1946); further systematised by Steinar Kvale	Francis Galton, Charles Booth, and early social statisticians; formalised by Paul Lazarsfeld in the 1940s
Tipus	Quantitative / mixed data collection technique	Qualitative research method	Quantitative (primarily) or mixed-methods data-collection instrument
Font seminal	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., & Brinkmann, S. (2009). InterViews: Learning the Craft of Qualitative Research Interviewing (2nd ed.). Sage. ISBN: 978-0761925422	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
Àlies	standardized interview, formal interview, schedule-based interview, fixed-format interview	guided interview, semi-standardized interview, focused interview, SSI	questionnaire survey, survey research, self-report survey, questionnaire study
Relacionats	4	6	6
Resum	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 semi-structured interview is a qualitative data-collection method in which the researcher prepares a set of key questions or topic areas in advance but remains free to probe, follow up, and reorder as the conversation evolves. Unlike structured interviews — which fix every question and sequence — or unstructured interviews — which are entirely open — the semi-structured format balances comparability across participants with the flexibility needed to capture the depth and nuance of individual perspectives. It is the most widely used interview format in social science, health, and education research.	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.