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Purple Unicorns, True Models, and Other Things I've Never Seen
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Edwards, Michael C. – Measurement: Interdisciplinary Research and Perspectives, 2013
This author has had the privilege of knowing Professor Maydeu-Olivares for almost a decade and although their paths cross only occasionally, such instances were always enjoyable and enlightening. Edwards states that Maydeu-Olivares' target article for this issue, ("Goodness-of-Fit Assessment of Item Response Theory Models") provides…
Descriptors: Goodness of Fit, Item Response Theory, Models, Factor Analysis
Goodness-of-Fit Assessment of Item Response Theory Models
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Maydeu-Olivares, Alberto – Measurement: Interdisciplinary Research and Perspectives, 2013
The article provides an overview of goodness-of-fit assessment methods for item response theory (IRT) models. It is now possible to obtain accurate "p"-values of the overall fit of the model if bivariate information statistics are used. Several alternative approaches are described. As the validity of inferences drawn on the fitted model…
Descriptors: Goodness of Fit, Item Response Theory, Models, Maximum Likelihood Statistics