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Item Response Theory2
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Applied Psychological…2
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Ali, Usama S.1
Drasgow, Fritz1
Edwards, Michael C.1
Houts, Carrie R.1
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Williams, Bruce1
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The Performance of Local Dependence Measures with Psychological Data
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Houts, Carrie R.; Edwards, Michael C. – Applied Psychological Measurement, 2013
The violation of the assumption of local independence when applying item response theory (IRT) models has been shown to have a negative impact on all estimates obtained from the given model. Numerous indices and statistics have been proposed to aid analysts in the detection of local dependence (LD). A Monte Carlo study was conducted to evaluate…
Descriptors: Item Response Theory, Psychological Evaluation, Data, Statistical Analysis
Fitting IRT Models to Dichotomous and Polytomous Data: Assessing the Relative Model-Data Fit of Ideal Point and Dominance Models
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Tay, Louis; Ali, Usama S.; Drasgow, Fritz; Williams, Bruce – Applied Psychological Measurement, 2011
This study investigated the relative model-data fit of an ideal point item response theory (IRT) model (the generalized graded unfolding model [GGUM]) and dominance IRT models (e.g., the two-parameter logistic model [2PLM] and Samejima's graded response model [GRM]) to simulated dichotomous and polytomous data generated from each of these models.…
Descriptors: Item Response Theory, Data, Models, Goodness of Fit