1. The effect of tangible reinforcers on performance on intelligence tests: A review;Bradley-Johnson,1980
2. Immediate & delayed reinforcement on WISC-R performance for low-income black and white children;Bradley-Johnson,1981
3. Effects of reinforcement on standardized test performance;Ayllon;Journal of Applied Behavior Analysis,1972
4. Mental retardation;Balla,1980
5. Influence of incentive upon intelligence test scores for school children;Benton;Journal of Genetic Psychology,1936