The relationship between the K-BIT, the Stanford-Binet, a two-subtest short form, and the K-TEA was examined with a population of 75 academically referred students. The K-BIT correlated significantly with the Stanford-Binet (.81) and the K-TEA Math (.57), Reading (38). and Spelling (.47) scores. The mean K-BIT IQ Composite (76.5) averaged 5.1 points lower than the mean Stanford-Binet Test Composite (81.6). The results tend to support the use of the K-BIT as a screening instrument when the Stanford-Binet is the follow-up or comprehensive measure of intelligence.
The Kaufman Brief Intelligence Test (K-BIT; Kaufman & Kaufman, 1990) was designed to provide a quick estimate of an individual's intellectual abilities. According to the test's authors, the K-BIT might be used in situations where "a brief measure of intelligence will suffice" and time and professional resources are limited (Kaufman & Kaufman, 1990, p. 1). For example, a school-based intervention team might screen referred students with the K-BIT to help decide whether a full evaluation to determine special education eligibility is warranted.
The purpose of the screening process described above is to save evaluation time and to reduce the testing load of the school psychologist. Reducing the school psychologist's testing load frees up time for him or her to engage in other activities such as consultation and designing and implementing interventions. For the K-BIT to be useful for this purpose, however, the student's performance on the K-BIT should accurately predict his or her performance on the follow-up comprehensive measure of intelligence. Because of this, it is important that the K-BIT have evidence supporting its concurrent validity with comprehensive measures of intelligence.
Research with the K-BIT has supported its concurrent validity with the Wechsler Intelligence Scale for Children-Revised (WISC-R; with nonhandicapped (r = .80; Kaufman & Kaufman, 1990, p. 66), referred (r = 31;. and juvenile delinquent (r = .a; populations. The K-BIT manual also reports that the K-BIT correlated significantly with the Kaufman Assessment Battery for Children (Kaufman & Kaufman, 1983; r = .69) with normal 7-to 9-year-olds. However, because the WISC-R is no longer in widespread use due to its recent revision (WISC-Third Edition; Wechsler, 1991), additional validity studies examining the relationship between the K-BIT and other intelligence tests are needed.