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| Διαχρονική Έρευνα× | Μεικτή Έρευνα (Mixed Methods Research)× | |
|---|---|---|
| Πεδίο≠ | Μεθοδολογία Επισκοπήσεων | Ποιοτικές Μέθοδοι |
| Οικογένεια | Process / pipeline | Process / pipeline |
| Έτος προέλευσης≠ | 1940s (panel survey tradition); longitudinal designs codified mid-20th century | — |
| Δημιουργός≠ | Established tradition; formalized in social science by Paul Lazarsfeld and colleagues (1940s panel studies) | — |
| Τύπος≠ | Quantitative / mixed-methods survey design | Research design framework |
| Θεμελιώδης πηγή≠ | Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922292 | Creswell, J.W. & Plano Clark, V.L. (2018). Designing and Conducting Mixed Methods Research (3rd ed.). Sage. ISBN: 978-1483344379 |
| Εναλλακτικές ονομασίες≠ | panel survey, repeated-measures survey, longitudinal panel study, wave survey | Karma Yöntem Araştırması (Mixed Methods), multi-method research, triangulation design |
| Συναφείς≠ | 3 | 4 |
| Σύνοψη≠ | A longitudinal survey collects structured questionnaire data from the same individuals or units at two or more distinct points in time. By tracking the same respondents across waves, researchers can distinguish genuine change from stable individual differences, establish temporal ordering between variables, and model trajectories of attitudes, behaviors, or outcomes in ways that a single cross-sectional snapshot cannot support. | Mixed methods research is a systematic research design in which quantitative and qualitative data are collected and analysed within a single study. Formalised by Creswell and Plano Clark (2003, 3rd ed. 2018), it offers three principal design variants — concurrent, sequential, and transformative — and strengthens findings through triangulation across both data strands. |
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