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Past experimental findings on the effects of externally mediated rewards on intrinsic motivation were explained on the basis of expectancy theory as a special case of the motivational effects on incentives. It was hypothesized that any reward object enhances its commensurate motive and weakens noncommensurate motives. The hypotheses were confirmed by means of partial correlational analyses of the relationships among intrinsic, status, and material rewards and motives measured in a survey of male kibbutz 3 workers, providing constructive replication of experimental findings and supporting expectancy theory. The results were discussed with reference to motivation in general as well 3s practical implications for applied settings.
Dov Eden (Mon,) studied this question.