A Horn Analysis of the Factors Measured by the WAIS-R,Kaufman Adolescent and Adult Intelligence Test (KAIT),and Two New Brief Cognitive Measures for Normal Adolescents and Adults

Data obtained on 255 normal individuals, ages 16-83, were factor analyzed. Variables included subtests from the WAIS-R, KAIT, and two new brief cognitive measures (K-FAST, K-SNAP). Four factors emerged that were interpreted from Horn's theory of intelligence: Crystallized (Gc), Fluid (Gf), Short-term Acquisition and Retrieval (SAR), and a blend of Broad Visualization (Gv) and Fluid. Results were interpreted in the context of previous Horn analyses of the KAIT and Wechsler's scales, with particular attention paid to the question of whether the WAIS-R Performance Scale measures fluid intelligence or whether it is primarily a measure of Gv, as some researchers contend.