Examined the construct validity of the Kaufman Assessment Battery for Children (K-ABC). Six subtests of the K-ABC and 1 test from the Wechsler Intelligence Scale for Children~~Revised (WISC~~R) were administered to 172 Egyptian children (aged 6-12 yrs) in Grades 1, 3, and 5. Using exploratory and confirmatory factor analysis, the factor structure for these Ss was obtained for Mental Processing and Achievement subtests and then compared to the factor structure obtained for children from the standardization sample. Analysis showed that the factor structure obtained from the Egyptian Ss was similar to the specified structure of the K-ABC. Results are discussed in terms of biological and cultural influences on the stability of the 2 modes of processing.