Rasch Models: How (In-)Coherently are they Showed and Used?
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| Autore: | |
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| Natura: | artículo original |
| Status: | Versión publicada |
| Data di pubblicazione: | 2015 |
| Descrizione: | Rasch models are widely used for the analysis of educational data. In practice, estimates of difficulties of items and abilities of examinees are reported. However, the meaning of the terms “difficulty” and “abilities” are never made explicit. The meaning of these terms does not depend on the estimations; they should be interpreted with respect to the eventual meaning of both item difficulties and individual abilities. This paper shows that the meaning of the terms “difficulty” and “ability” depends on the way in which the Rasch model is specified. In the psychometric literature, Rasch models are specified in two different ways: one specifies the observable only, whereas the other one specifies both observable and unobservable. The first specification is due to Rasch himself, the second one is due to Lord. |
| Stato: | Portal de Revistas UCR |
| Istituzione: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lingua: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/18911 |
| Accesso online: | https://revistas.ucr.ac.cr/index.php/actualidades/article/view/18911 |
| Keyword: | Axioma de independencia local rasgo latente dificultad de un ítem proporción de chances probabilidad inversa. Local independence axiom Latent trait Item difficulty Odds ratio Inverse probability. |