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Observations on the Factor Structure of the WAIS-R

L. Charles Ward

Veterans Affairs Medical Center Tuscaloosa, Alabama

Bradley N. Axelrod

John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan

Joseph J. Ryan

Dwight D. Eisenhower Veterans Affairs Medical Center, Leavenworth, Kansas

Confirmatory factor analyses (CFAs) revealed 2 important characteristics of the standardization data of the Wechsler Adult Intelligence Scale-Revised. One finding was that Digit Symbol fit better on an attentional factor in younger groups, but fit was better when Digit Symbol loaded on a visual-perceptual factor in older groups. A second observation was that specifying correlated errors or a fourth factor to explain covariance between Block Design and Object Assembly improved model fit in all age groups except 70to 74-year-olds. The results illustrate the value of CFA and have implications for investigating other samples and other Wechsler tests.

Key Words: WAIS-R • confirmatory factor analysis • linear structural models • intelligence • Wechsler scales

Assessment, Vol. 7, No. 1, 79-86 (2000)
DOI: 10.1177/107319110000700107
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