Study results indicate that overly powerful extrinsic rewards can reduce intrinsic motivation and suggest that there is a need to control unnecessarily powerful reward systems. (Author/DW)

Results of this field experiment supported the prediction that subjects in the expected-award condition would show less subsequent intrinsic interest in the target activity than subjects in either of the other two conditions (unexpected-award and no-award conditions). (Author/KM)

The notion that certain systems of reward may inhibit children's desire to participate in educational activities was investigated by reviewing recent research on intrinsic motivation. This research was critiqued from four theoretical perspectives: self-perception theory, personal causation, the overjustification hypothesis, and behavioral…

Designed for both parents and teachers, the handbook presents methods for educating the moderately and severely retarded child. Those methods include measuring progress, rewarding and punishing, ways of using rewards and punishers, ways of giving positive reinforcers and punishers, withholding reinforcers (extinction), letting the child reward…