Construct validity of the Kaufman Assessment Battery for Children with mildly mentally retarded students

The construct validity of the Kaufman Assessment Battery for Children (K-ABC) with mildly mentally retarded children was examined. Subjects were given three intelligence tests: the K-ABC, WISC-R, and Stanford Binet, Form L-M. Analysis of variance procedures revealed differences between the K-ABC Mental Processing Composite and the WISC-R Full Scale IQ, whereas the Stanford-Binet IQ was not reliably different from either. Correlational analysis provided supportive evidence that the K-ABC is measuring general intelligence; however, discrepancy between Sequential/Simultaneous scales and intersubtest correlations may not support distinct processing styles for mildly mentally retarded students, although this sample represents a restricted range.