He (he가 받는 사람이 내용에 나오지 않았습니다) The lecturer uses his personal experience to explain this concept.
First, he says that some measures were needed to manage patients who did not follow rules. So a local drug treatment center decided to give patients who behaved well more time to talk on the phone. However, this policy was not effective because most patients did not value having more time to use a phone. As a result, the situation at the center did not improve at all.
Second, he mentions that he helped the center institute a token reward system. Every patients received 1 token each day without a rule violation. The coin could be exchanged for a chosen reward. Because this was something to all patients, they are were motivated to follow the rules. The result was successful.
This example demonstrates how a token reward system can be effective.
Comments: 내용 정리도 잘 되어있고 문법 실수도 적은 편입니다.