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Confirmatory Factor Analysis of the Kaufman Adolescent and Adult Intelligence Test with Young Adolescents

University of Montana

Susan Jacob-Timm

Central Michigan University

This study examined the factor structure of the Kaufman Adolescent and Adult Intelligence Test (KAIT) in 375 11- to 14-year-olds (normative sample) and 60 sixth- and eighth-graders (cross-validation sample). Previous exploratory and confirmatory factor analyses of the KAIT have included optional subtests, which are often not administered in practice, and have not tested oblique versus orthogonal two-factor models. In this study, three factor models were tested via confirmatory factor analysis for the six core subtests of the KAIT: a one factor general intelligence (g) model, an orthogonal fluid intelligence (Gf)-crystallized intelligence (Gc) model, and an oblique Gf-Gc model. The orthogonal Gf-Gc model fit poorly in both samples. The g model fit only the cross-validation sample. The oblique Gf-Gc model fit both samples and fit significantly better than the g model in both samples. Additional tests of factor structure, path co-efficients, and covariance between Gf and Ge indicated that the data from both samples fit even the most restrictive oblique Gf-Gc model tested. KAIT users can be confident that the Fluid and Crystallized IQs from the KAIT are adequate representations of a robust and interpretable factor structure when only the core subtests are administered to young adolescents.

Key Words: KAIT • factor structure • adolescents • Gf • Gc • general intelligence

Assessment, Vol. 8, No. 1, 11-17 (2001)
DOI: 10.1177/107319110100800102


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				J. C. Caruso Increasing the Reliability of the Fluid/Crystallized Difference Score from the Kaufman Adolescent and Adult Intelligence Test with Reliable Component Analysis Assessment, June 1, 2001; 8(2): 155 - 166. [Abstract] [PDF]