Half of them were then asked to do a very simple self-affirmation task.

其中一半人要完成一个非常简单的自我肯定练习。

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So, simulation of high-stress situations, meditation and even positive self-affirmation serve as important brain nutrients.

所以，模拟高度紧张的情况，冥想，甚至积极的自我鼓励都有助于大脑发挥。

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But it apparently worked for African-American middle school students who engaged in a simple self-affirmation writing exercise.

但是对于参加了一个简单的自我肯定的写作练习的非裔美国中学生来说，这个方法显然起作用。

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"We found that self-affirmation completely eliminates the effects of chronic stress, " Creswell observed.

CNN: Boost your capacity to cope

There is no hard and fast rule about how often and how long one must engage in self-affirmation for it to work.

CNN: Boost your capacity to cope

In fact, the chronically stressed participants who performed a self-affirmation performed as well as the participants who reported having low chronic stress levels.

CNN: Boost your capacity to cope