extending the issue of the two-parent versus one-parent family is, "To what extent are these notions validated " cross-culturally?"

将双亲和单亲家庭的问题扩展了一下，“这些概念究竟在多大程度上,会因跨文化差异而有所变化“

耶鲁公开课 - 心理学导论课程节选

So, if you want to expand the notion of reward or reinforcement to anything, then it's true.

将奖励或强化的概念,扩展到任何事物上，都是正确的。

耶鲁公开课 - 心理学导论课程节选

And Skinner extended this more generally.

斯金纳对这一概念进行了扩展。

耶鲁公开课 - 心理学导论课程节选