The accuracy of item parameter estimates in the multidimensional item response theory (MIRT) model context is one that has not been researched in great detail. This study examines the ability of two confirmatory factor analysis models specifically for dichotomous data to properly estimate item parameters using common formulae for converting factor…

A series of behavioral expectation scale applications were analyzed in an attempt to point out an appropriate number of dimensions to be included in such studies. Results reflected the problems of dimension interdependence when the number of dimensions exceeds nine. (Author/JKS)

This study compares the ability of the multiple indicators, multiple causes (MIMIC) confirmatory factor analysis model to correctly identify cases of differential item functioning (DIF) with more established methods. Although the MIMIC model might have application in identifying DIF for multiple grouping variables, there has been little…