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| Longitudinal Item Response Theory (LIRT)× | Differenzielles Item-Funktionieren (DIF)× | |
|---|---|---|
| Fachgebiet | Psychometrie | Psychometrie |
| Familie | Latent structure | Latent structure |
| Entstehungsjahr≠ | 1991 | 1970s–1993 |
| Urheber≠ | Susan E. Embretson | William H. Angoff and colleagues (ETS); systematized by Holland & Wainer |
| Typ≠ | Latent trait / longitudinal psychometric model | Item-level bias detection |
| Wegweisende Quelle≠ | Embretson, S. E. (1991). A multidimensional latent trait model for measuring learning and change. Psychometrika, 56(3), 495–515. DOI ↗ | Holland, P. W. & Wainer, H. (Eds.) (1993). Differential Item Functioning. Lawrence Erlbaum Associates. ISBN: 978-0805809589 |
| Aliasnamen | LIRT, longitudinal IRT, repeated-measures IRT, dynamic item response modeling | DIF, item bias analysis, measurement non-equivalence, item-level measurement bias |
| Verwandt≠ | 4 | 5 |
| Zusammenfassung≠ | 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. | Differential item functioning identifies test or survey items that behave differently for examinees from different groups — such as gender, ethnicity, or language background — after controlling for the underlying ability or trait being measured. DIF analysis is essential for fairness evaluation in educational testing and psychological scale development. |
| ScholarGateDatensatz ↗ |
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