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Updated: Jun 22, 2026

Using Cholesky Decomposition to Explore Individual Differences in Longitudinal Relations between Reading Skills
Published on: September 17, 2019
An application of the multidimensional random coefficients multinomial logit model to evaluating cognitive models of
Edward W Wolfe1, Daniel T Hickey, Ann C H Kindfield
1Pearson, Assessment and Information, 2510 N. Dodge St., Mail Stop 130, Iowa City, IA 52245-9945, USA. Ed.Wolfe@Pearson.com
Abstract:
This article summarizes multidimensional Rasch analyses in which several alternative models of genetics reasoning are evaluated based on item response data from secondary students who participated in a genetics reasoning curriculum. The various depictions of genetics reasoning are compared by fitting several models to the item response data and comparing data-to-model fit at the model level between hierarchically nested models. We conclude that two two-dimensional models provide a substantively better depiction of student performance than does a unidimensional model or more complex three- and four-dimensional models.
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