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Hung, Lai-Fa; Wang, Wen-Chung – Journal of Educational and Behavioral Statistics, 2012
In the human sciences, ability tests or psychological inventories are often repeatedly conducted to measure growth. Standard item response models do not take into account possible autocorrelation in longitudinal data. In this study, the authors propose an item response model to account for autocorrelation. The proposed three-level model consists…
Descriptors: Item Response Theory, Correlation, Models, Longitudinal Studies