And the idea, again, is the kids who don't get rewarded say to themselves, "Well, I just spent time doing it, it must have an intrinsic value," while the children who get rewarded say, "I did it for the sticker. I did it for the toy.

再一次，没有得到奖励的孩子心里想，“我花了时间来做这件事，它一定是有内在的价值的”,而拿到奖励的小孩会说，“我是为了贴纸和玩具才做的”

耶鲁公开课 - 心理学导论课程节选