Kaufman Adolescent and Adult Intelligence Test (KAIT): Concurrent Validity of Fluid Ability for Preadolescents and Adolescents with Central Nervous System Disorders and Scholastic Concerns

Abstract

Fifty preadolescents and adolescents (33 with scholastic concerns and 17 with central nervous system disorders) were assessed with a battery that included the Wechsler Intelligence Scale for Children-Third Edition (WISC-III), the Kaufman Adolescent and Adult Intelligence Test (KAIT) Fluid subtests, and individually administered achievement tests. The KAIT Fluid IQ (FIQ) demonstrated acceptable concurrent validity with WISC-III IQ and with various achievement subtests, although an anticipated stronger association with Performance IQ than with Verbal IQ did not occur. Among subjects with scholastic concerns, KAIT FIQ was higher than WISC-III Full Scale IQ (100.6 vs. 90.3), and when KAIT FIQ was used as a predictor of achievement, more students with severe IQ/achievement discrepancies were identified (KAIT = 58%; WISC-III = 30%). Subjects with CNS disorders scored more poorly than their counterparts with scholastic concerns on the KAIT Fluid subtests but not on the WISC-III.