Σύγκριση μεθόδων

	Τριγωνοποιημένη ημι-δομημένη συνέντευξη	Semi-Structured Interview	Θεματική Ανάλυση
Πεδίο	Μεθοδολογία Επισκοπήσεων	Ποιοτικές Μέθοδοι	Ποιοτική Έρευνα
Οικογένεια	Process / pipeline	Process / pipeline	Process / pipeline
Έτος προέλευσης	Formalized in practice from the late 1970s onward	1946 (Merton & Kendall); codified as a standard method through the 1980s–1990s	2006
Δημιουργός	Synthesized from Norman K. Denzin (triangulation) and H. Russell Bernard (semi-structured interviewing)	Robert K. Merton and Patricia Kendall (focused interview, 1946); further systematised by Steinar Kvale	Virginia Braun and Victoria Clarke
Τύπος	Qualitative data collection technique	Qualitative research method	Method
Θεμελιώδης πηγή	Denzin, N. K. (1978). The Research Act: A Theoretical Introduction to Sociological Methods (2nd ed.). McGraw-Hill.	Kvale, S., & Brinkmann, S. (2009). InterViews: Learning the Craft of Qualitative Research Interviewing (2nd ed.). Sage. ISBN: 978-0761925422	Braun, V., & Clarke, V. (2006). Using thematic analysis in psychology. Qualitative Research in Psychology, 3(2), 77–101.
Εναλλακτικές ονομασίες	triangulated qualitative interview, multi-source semi-structured interview, triangulated in-depth interview, convergent interview strategy	guided interview, semi-standardized interview, focused interview, SSI	TA, Reflexive Thematic Analysis
Συναφείς	3	6	3
Σύνοψη	A triangulated semi-structured interview strategy combines the flexibility of open-ended, guided interviewing with deliberate triangulation across multiple informant groups, data sources, or interview occasions. By applying the same semi-structured protocol to different participant perspectives — such as clients, providers, and managers — or by pairing interviews with documents and observations, the approach cross-validates emerging themes and reduces the risk that any single viewpoint dominates the findings. The result is richer, more credible qualitative data than a single-source interview study can deliver.	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.	Thematic Analysis (TA) is a qualitative research methodology for identifying, analyzing, and reporting patterns (themes) in qualitative data. Developed systematically by Virginia Braun and Victoria Clarke (2006), TA is flexible and accessible, applicable across diverse theoretical frameworks and data types, making it one of the most widely used qualitative methods in psychology, health research, and social sciences.