来自《耶鲁大学开放课程：有关食物的心理学、生物学和政治学 第21集 第21集》

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  We took this other group we said,
  对第三组 我们说
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  what we want you to do is we want you to go--
  我们想要你去
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  we want you to test out this iPod
  我们想要你试试这个音乐播放器
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  to see how clear the music is on this walk.
  在走路过程中音乐的清晰度怎样
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  So they went on the exact same two mile walk,
  于是他们也走了相同的两英里
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  but they--it wasn't coded in their mind as exercise,
  但在他们心里觉得这不是运动
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  it was coded instead just as they're doing something kind of fun,
  而是一件有趣的事情
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  then they came back and ate too.
  然后他们回来后也吃了东西
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  The thing is it seems that
  结果看起来
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  when people actually believe they're exercising,
  当人们确实相信自己在做运动
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  they believe that they have put themselves out,
  他们觉得自己花了很多力气
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  and they need something in return.
  所以需要一些补偿