A Wherry (1984) hierarchical factor solution was obtained on the WAIS-
R subtest intercorrelations for 108 alcoholic adults. An ability arran
gement consistent with Vernon's (1950) structure-of-intellect paradigm
was found. This ability hierarchy consisted of a strong general intel
ligence (g) factor defined by all 11 subtests, which accounted for 49%
of the variance. The primary level of the ability hierarchy consisted
of spatial-perceptual-mechanical (k:m), Freedom from Distractibility
(FD), and Verbal Comprehension (VC) factors. Those respective factors
accounted for 86%, 4%, and 3% of the total subtest variance.