Dissertations and Theses @ UNI


Open Access Thesis


Wechsler Adult Intelligence Scale; Factor analysis; Vocational rehabilitation -- Evaluation;


This study replicates a study conducted by Harmon, Clausen, and Scott (1993) in which these researchers attempted to define the number of factors present in the cognitive factor structure of adults in a vocational rehabilitation setting. The Wechsler Adult Intelligence Scale-Revised (WAIS-R) and the Verbal Memory and Visual Memory Indices of the Wechsler Memory Scale-Revised (WMS-R) were the instruments used to define the factors in the Harmon et al. (1993) study as well as the current study. A larger sample size was utilized in the present study and went on to define the cognitive factor structure of these individuals by gender. The results of the current study for the entire sample conformed to those found by Harmon et al. (1993) and supported the uniqueness of a third factor when utilizing the WAIS-Rand the Verbal Memory and Visual Memory Indices of the WMS-R. When the sample was broken down by gender the results obtained for males and for females supported a three factor solution and although many similarities were found when comparing these results to the Harmon et al. (1993) study, these solutions did not conform precisely to those results obtained in the Harmon et al. (1993) study. Furthermore, in comparing the results of males and females, many similarities were found, but again these solutions did not conform precisely to each other.

Year of Submission


Degree Name

Specialist in Education


Department of Educational Psychology and Foundations

First Advisor

Ralph Scott

Second Advisor

Bruce Rogers

Third Advisor

Charles May


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Date Original


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