And his big finding is that you could separate people-- you could separate the question of laughter from the question of a joke or the question of humor.

他有一个重大的发现,你可以区分…,你可以区分什么是笑,什么是玩笑，什么是幽默。

耶鲁公开课 - 心理学导论课程节选

A lot of the work is done by Robert Provine who summarizes this in his excellent book Laughter.

很大研究都是Robert，Provine做的,他在一本很好的书《笑》中总结了他的研究。

耶鲁公开课 - 心理学导论课程节选