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Download full textFerrando, Pere J. – Psicologica: International Journal of Methodology and Experimental Psychology, 2015
The standard two-wave multiple-indicator model (2WMIM) commonly used to analyze test-retest data provides information at both the group and item level. Furthermore, when applied to binary and graded item responses, it is related to well-known item response theory (IRT) models. In this article the IRT-2WMIM relations are used to obtain additional…
Descriptors: Item Response Theory, Structural Equation Models, Goodness of Fit, Statistical Analysis
Ferrando, Pere J. – Psicologica: International Journal of Methodology and Experimental Psychology, 2012
Model-based attempts to rigorously study the broad and imprecise concept of "discriminating power" are scarce, and generally limited to nonlinear models for binary responses. This paper proposes a comprehensive framework for assessing the discriminating power of item and test scores which are analyzed or obtained using Spearman's…
Descriptors: Student Evaluation, Psychometrics, Test Items, Scores
