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Direct linkWang, Lijuan – Journal of Educational and Behavioral Statistics, 2010
This study introduces an item response theory-zero-inflated Poisson (IRT-ZIP) model to investigate psychometric properties of multiple items and predict individuals' latent trait scores for multivariate zero-inflated count data. In the model, two link functions are used to capture two processes of the zero-inflated count data. Item parameters are…
Descriptors: Item Response Theory, Models, Test Items, Psychometrics
