1. The effect of tangible rewards on the WISC-R performance of low-social status, black sixth graders;Yeager,1983
2. The effect of tangible rewards on the WISC-R performance of low-social status, white sixth graders;McMarthy,1982
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