Frequency of Occurrence of Four- and Five-Factor WAIS-IV Profiles
Cattell-Horn-Carroll Theory, factor analysis, Wechsler Adult Intelligence Scale-Fourth Edition
Applied Neuropsychology: Adult
Interpretive strategies for the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) include Wechsler's four-factor structure and the five-factor Cattell-Horn-Carroll (CHC) model. The frequency of profile occurrence and the contribution of demographic- and ability-related variables to their incidence are unknown. Current participants were 291 referrals (males = 134; female = 157) for neuropsychological evaluation with mean years for age and education of 34.94 (SD = 13.53) and 12.74 (SD = 2.46), respectively. Lichtenberger and Kaufman's guidelines for selecting each model were applied. Of the total, 67.3% were four-factor and 32.6% were five-factor profiles. The same pattern emerged when participants were subdivided by gender, education, ethnicity, IQ, and diagnosis. A noteworthy association between IQ and profile type emerged. When IQ increased, four-factor profiles declined and five-factors increased. A logistic regression, using demographics, IQ, and diagnosis as predictors, correctly classified 64.8% of participants. The average subtest intercorrelations and g saturations in the four-factor group were substantially larger than those for five-factor participants. These findings were consistent with Spearman's differentiation by ability hypothesis.
Ryan, J. J.,
Kreiner, D. S.,
Gontkovsky, S. T.,
Golden, C. J.,
(2019). Frequency of Occurrence of Four- and Five-Factor WAIS-IV Profiles. Applied Neuropsychology: Adult, 1-11.
Available at: https://nsuworks.nova.edu/cps_facarticles/1627