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The external validity of scores based on the twoparameter logistic model: Some comparisons between IRT and CTT

  • Datos identificativos

    Identificador: imarina:6385568
    Autores:
    Ferrando, Pere JChico, Eliseo
    Resumen:
    A theoretical advantage of item response theory (IRT) models is that trait estimates based on these models provide more test information than any other type of test score. It is still unclear, however, whether using IRT trait estimates improves external validity results in comparison with the results that can be obtained by using simple raw scores. This paper discusses some methodological results based on the 2-parameter logistic model (2PLM) and is concerned with three issues: first, how validity coefficients based on IRT trait estimates must be interpreted; second, how inferences about these coefficients can be made; and third, which differences in external validity can be expected if the 2PLM is correct for the data and IRT scores are used in place of raw scores. Four empirical examples in the personality domain provided further evidence for the results that can be expected in real research in which the model is, at best, a good approximation to the data. A general result of these examples was that validity coefficients based on IRT scores were similar to those based on raw scores.
  • Otros:

    Autor según el artículo: Ferrando, Pere J; Chico, Eliseo
    Departamento: Psicologia
    Autor/es de la URV: CHICO LIBRAN, ELISEO / Ferrando Piera, Pere Joan
    Palabras clave: Test psicológicos Teoria de respostes als items Statistics Social desirability Scale Reliability Personality Item response theory Extraversion Classical test theory Ability
    Resumen: A theoretical advantage of item response theory (IRT) models is that trait estimates based on these models provide more test information than any other type of test score. It is still unclear, however, whether using IRT trait estimates improves external validity results in comparison with the results that can be obtained by using simple raw scores. This paper discusses some methodological results based on the 2-parameter logistic model (2PLM) and is concerned with three issues: first, how validity coefficients based on IRT trait estimates must be interpreted; second, how inferences about these coefficients can be made; and third, which differences in external validity can be expected if the 2PLM is correct for the data and IRT scores are used in place of raw scores. Four empirical examples in the personality domain provided further evidence for the results that can be expected in real research in which the model is, at best, a good approximation to the data. A general result of these examples was that validity coefficients based on IRT scores were similar to those based on raw scores.
    Áreas temáticas: Statistics and probability Psychology, experimental Psychology (miscellaneous) Psicología Experimental and cognitive psychology Developmental and educational psychology Ciencias sociales Ciencias humanas Arts and humanities (miscellaneous)
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0211-2159
    Direcció de correo del autor: perejoan.ferrando@urv.cat
    Identificador del autor: 0000-0002-3133-5466
    Página final: 257
    Fecha de alta del registro: 2024-10-19
    Volumen de revista: 28
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://www.uv.es/psicologica/articulos2.07/8FERRANDO.pdf
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Psicologica. 28 (2): 237-257
    Referencia de l'ítem segons les normes APA: Ferrando, Pere J; Chico, Eliseo (2007). The external validity of scores based on the twoparameter logistic model: Some comparisons between IRT and CTT. Psicologica, 28(2), 237-257
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2007
    Página inicial: 237
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Arts and Humanities (Miscellaneous),Developmental and Educational Psychology,Experimental and Cognitive Psychology,Psychology (Miscellaneous),Psychology, Experimental,Statistics and Probability
    Test psicológicos
    Teoria de respostes als items
    Statistics
    Social desirability
    Scale
    Reliability
    Personality
    Item response theory
    Extraversion
    Classical test theory
    Ability
    Statistics and probability
    Psychology, experimental
    Psychology (miscellaneous)
    Psicología
    Experimental and cognitive psychology
    Developmental and educational psychology
    Ciencias sociales
    Ciencias humanas
    Arts and humanities (miscellaneous)
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