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| Multigrupps-Raschmodell× | Raschmodell× | |
|---|---|---|
| Ämnesområde | Psykometri | Psykometri |
| Familj | Latent structure | Latent structure |
| Ursprungsår≠ | 1960 (Rasch); 1980s–1990s (multi-group extensions) | 1960 |
| Upphovsperson≠ | Georg Rasch (single-group); extended to multi-group applications by Fischer, Molenaar, and others | Georg Rasch |
| Typ≠ | Item response model / measurement invariance test | Item Response Theory / Latent trait model |
| Ursprungskälla≠ | Fischer, G. H. & Molenaar, I. W. (Eds.) (1995). Rasch Models: Foundations, Recent Developments, and Applications. Springer. ISBN: 978-0387944296 | Rasch, G. (1960). Probabilistic Models for Some Intelligence and Attainment Tests. Danish Institute for Educational Research, Copenhagen. link ↗ |
| Alias | MG-Rasch, Rasch measurement invariance, multi-group 1PL IRT, cross-group Rasch analysis | 1PL IRT, one-parameter logistic model, Rasch Modeli — 1PL IRT, 1PL model |
| Närliggande | 6 | 6 |
| Sammanfattning≠ | The multi-group Rasch model fits the one-parameter logistic item response model simultaneously across two or more distinct groups, testing whether item difficulty parameters are invariant across groups. It is the primary psychometric tool for establishing that a scale measures the same latent trait with the same metric in each group, a prerequisite for meaningful score comparisons. | The Rasch model, introduced by Georg Rasch in 1960, is the simplest member of the Item Response Theory (IRT) family. It assigns a single difficulty parameter to each test item and places both item difficulties and person abilities on the same logit scale, enabling direct, sample-independent comparison of items and persons. |
| ScholarGateDatamängd ↗ |
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