ABSTRACT
In contrast to the example provided in chapter 8, the present application focuses on tests for invariance related to a single measuring instrument, the Self Description Questionnaire III (SDQ-III, Marsh, 1992b). Specifically, we explore the factorial equivalence of the SDQ-III across two academically tracked (low and high) groups of high school students. (For details related to the sample, and other aspects of the study, readers are referred to the original publication, (see, Byrne, 1988c); for a more extensive discussion of academic tracking, as it relates to the data used in the present example, see Byrne, 1988a; and for detailed description and evaluation of the SDQ-III, see Cromer, 1999.)
