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| Θεωρία Γενικευσιμότητας (G-Theory)× | Αξιοπιστία Επαναληπτικών Μετρήσεων× | |
|---|---|---|
| Πεδίο | Ψυχομετρία | Ψυχομετρία |
| Οικογένεια | Latent structure | Latent structure |
| Έτος προέλευσης≠ | 1963–1972 | 1904 |
| Δημιουργός≠ | Lee J. Cronbach, Goldine Gleser, Harinder Nanda, Nageswari Rajaratnam | Karl Pearson |
| Τύπος≠ | Variance-components reliability model | Reliability estimate |
| Θεμελιώδης πηγή≠ | Cronbach, L. J., Gleser, G. C., Nanda, H. & Rajaratnam, N. (1972). The Dependability of Behavioral Measurements: Theory of Generalizability for Scores and Profiles. Wiley. link ↗ | Nunnally, J. C. & Bernstein, I. H. (1994). Psychometric Theory (3rd ed.). McGraw-Hill. ISBN: 978-0070478497 |
| Εναλλακτικές ονομασίες≠ | G-theory, G-study / D-study framework, variance components reliability | stability reliability, temporal stability, repeatability coefficient, TRT reliability |
| Συναφείς | 4 | 4 |
| Σύνοψη≠ | Generalizability Theory is a psychometric framework that decomposes observed score variance into multiple sources — persons, items, raters, occasions, and their interactions — using analysis of variance. It replaces the single reliability coefficient of classical test theory with a family of coefficients that tell researchers how well scores generalize across different measurement conditions. | Test-retest reliability quantifies the temporal consistency of a measure by correlating scores obtained from the same participants on two separate occasions. It is a cornerstone of psychometric validation, directly indicating whether a scale or instrument yields stable scores when the underlying construct has not changed. |
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