This is Doctor Sigmund Freud, one of the most innovative thinkers in the history of psychology.

这就是西格蒙德·弗洛伊德博士，心理学史上最具创新精神的思想家之一。

It's illustrated by one of the strangest experiments in the history of psychology where they had people on a boat and then they had them scuba dive underwater.

心理学史上最奇怪的实验之一就说明了这一点， 他们让人们在船上， 然后让他们水肺潜水。