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Download full textXu, Xueli; von Davier, Matthias – ETS Research Report Series, 2008
The general diagnostic model (GDM) utilizes located latent classes for modeling a multidimensional proficiency variable. In this paper, the GDM is extended by employing a log-linear model for multiple populations that assumes constraints on parameters across multiple groups. This constrained model is compared to log-linear models that assume…
Descriptors: Comparative Analysis, Models, Computation, National Competency Tests
