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A Multilevel Nonlinear Profile Analysis Model for Dichotomous Data
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Culpepper, Steven Andrew – Multivariate Behavioral Research, 2009
This study linked nonlinear profile analysis (NPA) of dichotomous responses with an existing family of item response theory models and generalized latent variable models (GLVM). The NPA method offers several benefits over previous internal profile analysis methods: (a) NPA is estimated with maximum likelihood in a GLVM framework rather than…
Descriptors: Profiles, Item Response Theory, Models, Maximum Likelihood Statistics
An Empirical Demonstration of the Factor Differentiation Hypothesis
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Allen, Mary J. – Multivariate Behavioral Research, 1978
The factor differentiation hypothesis suggests that the factor structure of a set of tests tends to differentiate over time, becoming more complex and articulated. This experimental study provides evidence confirming that hypothesis. (Author/JKS)
Descriptors: Difficulty Level, Enlisted Personnel, Factor Analysis, Factor Structure
Calibration of Invariant Item Parameters in a Continuous Item Response Model Using the Extended Lisrel Measurement Submodel.
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Ferrando, Pere J. – Multivariate Behavioral Research, 1996
The usefulness of the confirmatory factor analysis model of D. Sorbom (1974) to estimate invariant difficulty and discrimination item parameters on a personality scale was supported in a study using responses of 834 undergraduates to the Social Worry Scale of the Anxious Thoughts Inventory (A. Wells, 1994). (SLD)
Descriptors: Anxiety, Difficulty Level, Estimation (Mathematics), Higher Education