A predictive validity study of the Kaufman Assessment Battery for Children with the California Achievement Test

The Kaufman Assessment Battery for Children (K-ABC) was administered to 44 4th-, 5th-, and 6th-grade students. Six months later, all students received the California Achievement Test (CAT). Significant positive correlations were obtained between K-ABC variables and CAT scores. CAT subtest scores and total score correlated higher with the K-ABC ACHV scale than with the K-ABC SEQ, SIM, or MPC scales on 8 of the 12 comparisons. The results support the predictive utility of the K-ABC, and also provide support for the differential validity of the K-ABC achievement vs. mental processing scales.