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| Longitudinal Item Response Theory (LIRT)× | Test af longitudinel måleinvarians× | |
|---|---|---|
| Fagområde | Psykometri | Psykometri |
| Familie | Latent structure | Latent structure |
| Oprindelsesår≠ | 1991 | 1993 |
| Ophavsperson≠ | Susan E. Embretson | William Meredith |
| Type≠ | Latent trait / longitudinal psychometric model | Measurement model testing |
| Oprindelig kilde≠ | Embretson, S. E. (1991). A multidimensional latent trait model for measuring learning and change. Psychometrika, 56(3), 495–515. DOI ↗ | Meredith, W. (1993). Measurement invariance, factor analysis and factorial invariance. Psychometrika, 58(4), 525–543. DOI ↗ |
| Aliasser | LIRT, longitudinal IRT, repeated-measures IRT, dynamic item response modeling | LMI, longitudinal invariance, measurement equivalence across time, temporal measurement invariance |
| Relaterede≠ | 4 | 3 |
| Resumé≠ | Longitudinal IRT extends classical item response theory to data collected at multiple time points, allowing researchers to model both the initial latent trait level and its change over time. It is used in educational assessment, clinical trials, and panel studies where the same items or item banks are administered repeatedly to the same individuals. | Longitudinal measurement invariance testing determines whether a psychological scale measures the same construct in the same way across two or more time points. It is a prerequisite for interpreting mean-level change scores in panel and repeated-measures studies, ensuring that observed change reflects true change in the construct rather than drift in the measurement instrument. |
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