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| Ορθολογικό Μοντέλο Rasch (Μοντέλα Κλίμακας Βαθμολόγησης και Μερικής Πίστωσης)× | Επαληθευτική Παραγοντική Ανάλυση (Confirmatory Factor Analysis - CFA)× | |
|---|---|---|
| Πεδίο | Ψυχομετρία | Ψυχομετρία |
| Οικογένεια | Latent structure | Latent structure |
| Έτος προέλευσης≠ | 1978–1982 | 1969 |
| Δημιουργός≠ | David Andrich (RSM, 1978); Geoff Masters (PCM, 1982) | Karl Gustav Jöreskog |
| Τύπος≠ | Item response model for ordered categories | Hypothesis-testing latent variable model |
| Θεμελιώδης πηγή≠ | Andrich, D. (1978). A rating formulation for ordered response categories. Psychometrika, 43(4), 561–573. DOI ↗ | Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. Psychometrika, 34(2), 183–202. DOI ↗ |
| Εναλλακτικές ονομασίες | Rating Scale Model, Partial Credit Model, RSM, PCM | CFA, confirmatory FA, measurement model, restricted factor analysis |
| Συναφείς≠ | 6 | 4 |
| Σύνοψη≠ | The ordinal Rasch model extends the dichotomous Rasch framework to items with ordered response categories such as Likert-type scales. It places both persons and items on a shared interval-level metric, enabling principled measurement from ordinal data while checking whether items function consistently across all response thresholds. | Confirmatory factor analysis tests a researcher-specified factor structure against observed data. Unlike exploratory approaches, the researcher decides in advance which indicators load on which latent factor, and the model is evaluated by how closely the implied covariance matrix reproduces the sample covariance matrix. CFA is central to scale validation, construct validity assessment, and measurement invariance testing. |
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