The concurrent validity of the Kaufman Assessment Battery for Children (K-ABC) was examined by comparing K-ABC scores and Weschler Intelligence Scale for Children--Revised (WISC-R) scores for 58 school children in primary and intermediate grades. Thirty-seven of these children had either educable mental retardation, learning disabilities, or emotional disturbances; six were gifted. To determine if these scores were related or significantly different, t-tests, Pearson r correlations, a canonical correlation, and regression equations were computed. Results indicated that mean scores of the scales of both the WISC-R and the K-ABC did not differ significantly. Also, significant correlations were obtained since all scales were highly interrelated. Separate K-ABC achievement subscale scores were also correlated with the K-ABC's mental processing composite subscale score. These outcomes suggested that the K-ABC possesses high concurrent validity when compared with the WISC-R. However, it may be premature to assume that the K-ABC is an adequate substitute. (Author/GDC)