Krahasoni metodat
Shqyrtoni metodat e zgjedhura krah për krah; rreshtat që ndryshojnë janë të theksuar.
| Diferencimi i Përditshëm i Funksionimit të Artikulit (Longitudinal DIF)× | Teoria e Përgjigjes së Pjesëve (IRT)× | |
|---|---|---|
| Fusha | Psikometri | Psikometri |
| Familja | Latent structure | Latent structure |
| Viti i origjinës≠ | 1980s–2000s | 1952–1968 |
| Krijuesi≠ | Multiple contributors; foundational DIF methods by Lord (1980) extended to longitudinal designs | Frederic M. Lord (and Allan Birnbaum for the 2PL/3PL models) |
| Lloji≠ | Item-level bias detection across time | Probabilistic measurement model |
| Burimi themelues≠ | Millsap, R. E., & Kwok, O. M. (2004). Evaluating the impact of partial factorial measurement invariance on selection in two groups. Psychological Methods, 9(1), 93–115. DOI ↗ | Lord, F. M. & Novick, M. R. (1968). Statistical Theories of Mental Test Scores. Addison-Wesley. link ↗ |
| Emërtime të tjera | longitudinal DIF, DIF across time, temporal DIF, longitudinal item bias | IRT, latent trait theory, item characteristic curve theory, modern test theory |
| Të lidhura≠ | 6 | 5 |
| Përmbledhja≠ | Longitudinal differential item functioning detects whether individual test or scale items behave differently across measurement occasions for the same respondents. It extends standard DIF methodology to repeated-measures designs, ensuring that observed change scores genuinely reflect construct change rather than shifts in item characteristics over time. | Item response theory models the probability that a respondent answers an item correctly (or endorses it) as a function of the respondent's latent trait level and the item's own statistical properties — difficulty, discrimination, and guessing. Unlike classical test theory, IRT places persons and items on the same scale, yielding measurement that is sample-independent for items and test-independent for persons. |
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