Now, that's actually a difficult question to ask-- to answer for a child, but I tried my best to give him an answer.

向一个孩子解释这个问题其实挺困难的，但我还是尽力给了他一个答案。

耶鲁公开课 - 心理学导论课程节选

But of course this is a poor, black child growing up in the South, and his expectations, what his mind can imagine, is always going to be greater than what the world can deliver.

但要记得，这个黑人穷孩子是在南方长大的，他的期待，他想象的东西，总好过现实。

耶鲁公开课 - 1945年后的美国小说课程节选

In fact though, the children who you reward later on think that this activity has less value and they are less likely to do it when there's no reward present.

但事实上，拿到奖励的孩子会想,这个活动的价值变低了，如果没有奖励,他们就不太可能会再做。

耶鲁公开课 - 心理学导论课程节选