J. Donders, CLUSTER SUBTYPES IN THE WISC-III STANDARDIZATION SAMPLE - ANALYSIS OFFACTOR INDEX SCORES, Psychological assessment, 8(3), 1996, pp. 312-318
Representative profile subtypes, based on factor index scores, were ex
amined in the standardization sample of the Wechsler Intelligence Scal
e for Children-Third Edition (WISC-III; Wechsler, 1991). Two-stage clu
ster analysis identified 5 reliable subtypes. Three of these were diff
erentiated by levels of performance (ranging from below average, to av
erage, to above average); the other 2 were characterized by patterns o
f performance, with relative efficacy on the processing speed factor b
eing the most prominent distinction (ranging from a relative weakness
to a relative strength), The cluster subtypes did not differ significa
ntly in age, but parental level of education covaried directly with le
vel of WISC-III performance. A method for determining the relative uni
queness of clinically obtained WISC-III factor index score patterns is
presented.