Real life for both humans and animals involved cases where the reinforcement doesn't happen all the time but actually happens according to different schedules.

在现实中，人类和动物,并不总是不停的得到强化,但实际上强化则是根据不同的时程出现的。

耶鲁公开课 - 心理学导论课程节选

Because the melody changes and not all harmonies are concordant with every note.

由于旋律在不停变化而且不是所有的和弦都和每个音符一致。

耶鲁公开课 - 聆听音乐课程节选

And then later on the kid's going to say, " "I want to do it again" and you say no and the kid keeps asking because you've put it, well, put it as in a psychological way, not the way the behaviorists would put it.

这样以后，孩子还是会说，“我还想和你一起睡,你说不行,然后孩子就不停的问你,从心理学的角度来看，这是因为，你并未采取行为主义者们会采取的方法。

耶鲁公开课 - 心理学导论课程节选