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Wang, Wen-Chung; Chyi-In, Wu – Educational and Psychological Measurement, 2004
Because of the requirement of reporting effect sizes and in the interest of measurement of change within the item response theory framework, their combination becomes a new issue. In the present study, repeated measures are decomposed as an initial ability and one or more modifiabilities (gain score) using a multidimensional Rasch model. The…
Descriptors: Simulation, Effect Size, Item Response Theory, Meta Analysis