The thing to keep in mind is this guy had huge psychiatric problems. He was profoundly depressed and self-stimulation did not appear to help.

有一点值得记住的是，这个人有巨大的精神压力，深刻的抑郁症，而这种自我刺激看上去起不了什么作用。

youdao

The general story of why we can't in general is because there's no surprise, there's no mock aggression, and also there may be a general deadening of self-stimulation.

为什么大部分人不能胳肢自己，是因为它在我们意料之内，没有打闹的侵略性，通常这种引自己笑的念头都会嘎然而止。

youdao

CONCLUSION: Stimulation, self respect, cognitive evaluation and ability are the key factors that determine the anxiety.

结论：刺激、自尊、认知评价和能力是决定焦虑的四大重要因素。

youdao

The general story of why we can't in general is because there's no surprise, there's no mock aggression, and also there may be a general deadening of self-stimulation.

为什么大部分人不能胳肢自己,是因为它在我们意料之内，没有打闹的侵略性，通常这种引自己笑的念头都会嘎然而止。

耶鲁公开课 - 心理学导论课程节选

In later experiments, when they were allowed to push a stimulation lever on their own accord, they self-stimulated hundreds of times per hour.

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