Representation of the Cattell Horn Carroll Theory of Cognitive Abilities in the Factor Structure of the Dutch Language Version of the WAIS IV
The Cattell Horn Carroll (CHC) theory of cognitive abilities has been guiding in the revision of the Wechsler Adult Intelligence Scale Fourth edition (WAIS IV) Especially the measurement of fluid reasoning (Gf) is improved. A total of five CHC abilities are included in the WAIS IV subtests. Using confirmatory factor analysis, a five factor model based on these CHC abilities is evaluated and compared with the four index scores in the Dutch language version of the WAIS IV. Both models demonstrate moderate fit, preference is given to the five factor CHC model both on statistical and theoretical grounds. Evaluation of the WAIS IV according to CHC terminology enhances uniformity, and can be important when interpreting possible sources of index discrepancies. To optimally assemblage CHC and WAIS IV, more knowledge of the interaction of abilities is needed. This can be done by incorporating intelligence testing in neuropsychological assessment. Using this functional approach contributes to a better understanding of an individual's cognitive profile.
Assessment