And so what you want to do, basically drawing upon the law of effect, is reinforce the pig for doing good things.

你所要做的就是，应用效果律，强化这头猪做出的令你满意的行为。

耶鲁公开课 - 心理学导论课程节选

So this could be summarized as the law of effect, which is a tendency to perform an action's increased if rewarded, weakened if it's not.

这种行为上的变化被称之为效果律，也就是说，行为倾向随奖励而增加，随惩罚而减少。

耶鲁公开课 - 心理学导论课程节选