A Reexamination of the WAIS-R Factor Structure

Niels G Waller, Irwin D. Waldman

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The factor structure of Weschler's Adult Intelligence Scale-Revised (WAIS-R) has been a subject of controversy since the instrument was first published. We performed a series of restricted factor analyses on the 9 cohorts of the WAIS-R standardization sample in an effort to investigate the structure of this instrument. Several indices of fit were used including (a) the likelihood ratio test statistic, chi-square; (b) the LISREL Goodness of Fit Index; (c) the normed-fit index, with both a null and informed baseline; (d) the rescaled Akaike and Schwartz criteria; and (e) the root mean square residual. Results indicated that a 3-factor model accounts best for the relations among the 11 WAIS-R subtests in 8 of the 9 standardization cohorts. The 3 factors correspond to the Verbal Comprehension, Perceptual Organization, and Memory/Freedom From Distractibility factors that have been identified in the WAIS. Factor comparison procedures were used to test the generalizability of this structure in psychiatric and medical samples.

Original languageEnglish (US)
Pages (from-to)139-144
Number of pages6
JournalPsychological assessment
Volume2
Issue number2
DOIs
StatePublished - Jun 1990

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