14.1 What is motivation Lepper's experiment on the impact of rewards on motivation The results showed that those who had received a reward for drawing spent about half as much time drawing as those who had received the surprisereward and those who had not gotten The authors suggested that promising extrinsic rewards for an activity that is intrinsically interesting may undermine intrinsic interest by inducing children to expect a reward for doing what they had previously done nothing14.1 What is motivation • Lepper’s experiment on the impact of rewards on motivation • The results showed that those who had received a reward for drawing spent about half as much time drawing as those who had received the “surprise”reward and those who had not gotten. • The authors suggested that promising extrinsic rewards for an activity that is intrinsically interesting may undermine intrinsic interest by inducing children to expect a reward for doing what they had previously done nothing