Article
Establishing Covariance Continuity between the WISC--R and the WISC-III.
Psychological Assessment
(1995)
Abstract
Much of the research based on Wechsler Intelligence Scale for Children—Revised (WISC—R; D. Wechsler, 1974) subtest covariances may not validly be applied to the Wechsler Intelligence Scale for Children-Third Edition (WISC-III; D. Wechsler, 1991) without ascertaining whether the covariance structures of the normative samples for the two versions are equivalent. The covariance matrices for the WISC—R and the WISC-III were tested for equality by age group using the EQS Structural Equations Program (P. M. Bentler, 1989). Chi-square tests revealed significant differences between the covariance matrices for 10- and 16-year-olds; however, the more stable normed fit index revealed essentially no difference across all age groups. It can be concluded that, for all practical purposes, covariation among WISC-III subtests does not differ from covariation among WISC—R subtests.
Keywords
- covariance,
- continuity,
- WISC--R,
- WISC-III
Disciplines
Publication Date
January 1, 1995
DOI
10.1037//1040-3590.7.1.115
Citation Information
Wallace E. Dixon and Timothy Anderson. "Establishing Covariance Continuity between the WISC--R and the WISC-III." Psychological Assessment Vol. 7 Iss. 1 (1995) p. 115 - 117 ISSN: 1040-3590 Available at: http://works.bepress.com/wallace-dixon/8/