The IRT Procedure (Experimental)

Basic Features

The IRT procedure enables you to estimate various item response theory models. The following list summarizes some of the basic features of the IRT procedure:

  • uses the Rasch model; one-, two-, three-, and four-parameter models; and graded response model with logistic or probit link

  • enables different items to have different response models

  • performs multidimensional exploratory and confirmatory analysis

  • performs multiple-group analysis, with fixed values and equality constraints within and between groups

  • estimates factor scores by using maximum likelihood (ML), maximum a posteriori (MAP), and expected a posteriori (EAP) methods