Two studies were conducted to evaluate the longterm predictive validity of the Cognitive Ability Scales (CAS), a test designed specifically for 2and 3-year-old children. The ability of the CAS to predict intelligence and reading and math achievement was evaluated with two samples of children (N = 20 and N = 30) enrolled in grades one through five. An interval of approximately 5 years was used. The CAS predicted performance on the Binet-IV and the WISC-R with correlations in the moderate range. Correlations of CAS Math results with the Test of Early Mathematical Ability and the K-TEA Math were also in the moderate range. Correlations of CAS Reading results with the Test of Early Reading Ability-2 and the K-TEA Reading, however, were in the low to moderate range. Thus, adequate long-term predictive validity for the CAS was demonstrated for intelligence and math performance.
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