And his discoveries that-- they did them in different ways at different ages led to the emergence of the Stage Theory.

他发现,儿童在不同的年龄拥有不同的行为方式,他根据这一发现提出了阶段理论

耶鲁公开课 - 心理学导论课程节选

In times of stress and trauma, they'll become younger, they will act younger.

在他们感到压力和受伤的时候，他们回到更加年幼的阶段，表现出年幼时的行为。

耶鲁公开课 - 心理学导论课程节选

You're not out of the woods yet Even if you haven't got fixated on anything, there's still this dynamic going on all the time with your id, your ego and your superego.

你并没有脱离险境,即使你并没在任何阶段里发生固着，你的行为仍然会一直受到本我，自我和超我的驱使。

耶鲁公开课 - 心理学导论课程节选