Validity of the Kaufman Brief Intelligence Test.

The Kaufman Brief Intelligence Test (K-BIT) is a motor-free screening measure of intelligence that yields Verbal, Nonverbal, and Composite IQ estimates. To determine its concurrent validity, the K-BIT and the Wechsler Adult Intelligence Scale-Revised (WAIS-R) were administered as part of a neuropsychological examination to 200 clinical patients ages 16-74 years. Correlations between the Verbal, Nonverbal, and Composite scales of the 2 measures were.83,.77, and.88, respectively. WAIS-R and K-BIT scores were also similar across age and educational levels, although mean K-BIT scores tended to be approximately 5 points higher than their WAIS-R counterparts. Differences between the 2 measures could not be attributed to psychomotor speed, expressive language, or manual dexterity