The external validity of scores based on the twoparameter logistic model: Some comparisons between IRT and CTT
Fuente:
Redalyc
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Universitat de València
2007
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1876448583137361920 |
|---|---|
| author | Pere J. Ferrando |
| author_facet | Pere J. Ferrando |
| contents | The external validity of scores based on the twoparameter logistic model: Some comparisons between IRT and CTT Pere J. Ferrando Eliseo Chico Psicología A theoretical advantage of item response theory (IRT) models is that traitestimates based on these models provide more test information than anyother type of test score. It is still unclear, however, whether using IRT traitestimates improves external validity results in comparison with the resultsthat can be obtained by using simple raw scores. This paper discusses somemethodological results based on the 2-parameter logistic model (2PLM) andis concerned with three issues: first, how validity coefficients based on IRTtrait estimates must be interpreted; second, how inferences about thesecoefficients can be made; and third, which differences in external validitycan be expected if the 2PLM is correct for the data and IRT scores are usedin place of raw scores. Four empirical examples in the personality domainprovided further evidence for the results that can be expected in realresearch in which the model is, at best, a good approximation to the data. Ageneral result of these examples was that validity coefficients based on IRTscores were similar to those based on raw scores. 2007 artículo científico 0211-2159 https://www.redalyc.org/articulo.oa?id=16928208 en http://www.redalyc.org/revista.oa?id=169 Psicológica application/pdf Universitat de València Psicológica (España) Num.2 Vol.28 |
| format | Artículo científico |
| id | redalyc_16928208 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Universitat de València |
| spellingShingle | The external validity of scores based on the twoparameter logistic model: Some comparisons between IRT and CTT Pere J. Ferrando Psicología The external validity of scores based on the twoparameter logistic model: Some comparisons between IRT and CTT Pere J. Ferrando Eliseo Chico Psicología A theoretical advantage of item response theory (IRT) models is that traitestimates based on these models provide more test information than anyother type of test score. It is still unclear, however, whether using IRT traitestimates improves external validity results in comparison with the resultsthat can be obtained by using simple raw scores. This paper discusses somemethodological results based on the 2-parameter logistic model (2PLM) andis concerned with three issues: first, how validity coefficients based on IRTtrait estimates must be interpreted; second, how inferences about thesecoefficients can be made; and third, which differences in external validitycan be expected if the 2PLM is correct for the data and IRT scores are usedin place of raw scores. Four empirical examples in the personality domainprovided further evidence for the results that can be expected in realresearch in which the model is, at best, a good approximation to the data. Ageneral result of these examples was that validity coefficients based on IRTscores were similar to those based on raw scores. 2007 artículo científico 0211-2159 https://www.redalyc.org/articulo.oa?id=16928208 en http://www.redalyc.org/revista.oa?id=169 Psicológica application/pdf Universitat de València Psicológica (España) Num.2 Vol.28 |
| title | The external validity of scores based on the twoparameter logistic model: Some comparisons between IRT and CTT |
| topic | Psicología |
| url | https://www.redalyc.org/articulo.oa?id=16928208 |