Ems. Sherman et al., CONSTRUCT-VALIDITY OF WAIS-R FACTORS - NEUROPSYCHOLOGICAL TEST CORRELATES IN ADULTS REFERRED FOR EVALUATION OF POSSIBLE HEAD-INJURY, Psychological assessment, 7(4), 1995, pp. 440-444
A 3-factor solution of the Wechsler Adult Intelligence Scale-Revised (
WAIS-R; Wechsler, 1981) in 260 adults with suspected head injury sugge
sted relatively good construct validity for the factors, based on corr
elations with neuropsychological tests purported to measure similar ab
ilities. The Verbal Comprehension factor was related to verbal ability
, verbal memory, and executive functioning. The Perceptual Organizatio
n factor, although measuring primarily visual-spatial perception and v
isual constructional ability, was related to visual-spatial memory, vi
sual attention, and executive functioning. The Freedom From Distractib
ility factor was correlated with two attention measures and was not as
sociated with memory measures. Its association with executive function
ing was inconsistent. The findings are discussed in terms of the multi
dimensional nature of neuropsychological tests and WAIS-R factors.