Reinforcement can be intrinsic , extrinsic or extraneous .
强化可以是内在的、外在的或无关的。
The key to understanding these behaviours lies in the difference between intrinsic and extrinsic motivation .
要理解这些行为的关键是区分内在动力和外在的动力。
On the other hand when we do something because we receive some reward , like a certificate or money , this is extrinsic motivation .
另一方面当我们为了得到奖励而去做某事的时候，比如证书或者金钱，就是外在的动机。
The most important intrinsic and extrinsic factors that determine energy balance health behaviours will be identified through multidisciplinary analysis , and translated into the evidence and theory-based energy intervention .
But people who primarily seek extrinsic rewards , such as money or status , often aren 't as happy , says richard ryan , professor of psychology , psychiatry and education at the university of rochester .
