title: Validity of the Wechsler abbreviated scale of intelligence and other very short forms of estimating intellectual functioning.
abstract: Performance on the Wechsler Adult Intelligence Scale-III (WAIS-III) was compared to performance on the Wechsler Abbreviated Scale of Intelligence (WASI), as well as short form estimations of intellectual functioning derived from WAIS-III performance, in a mixed clinical sample of 72 participants. The WASI verbal IQ (VIQ) score was significantly higher than the WAIS-III VIQ, whereas performance IQ (PIQ) estimates all differed from actual WAIS-III PIQ and full scale IQ (FSIQ). Correlations of WAIS-III scores with WASI scores were consistently lower than were correlations between the WASI-III and all other short forms. Although maintaining administration times of 15 minutesfor a two-subtest FSIQ and 30 minutes for a four-subtest FSIQ, the WASI did not consistently demonstrate desirable accuracy in predicting scores obtained from the WAIS-III. The results suggest that clinicians should use the WASI cautiously if at all, especially when accurate estimates of individuals' WAIS-III results are needed.
authors.affiliation: Psychology Section, Department of Veterans Affairs Medical Center, Detroit, MI 48201-1916, USA. bradley.axelrod@med.va.gov
authors.forename: Bradley N
authors.initials: BN
authors.lastname: Axelrod
mesh_terms: D000704:Analysis of Variance; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis; D008875:Middle Aged; D015203:Reproducibility of Results; D013997:Time Factors; D014481:United States; D014888:Wechsler Scales