来自《耶鲁大学开放课程：心理学导论 第7集》

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  cause your visual system to make guesses about distance.
  使你的视觉系统对距离作出猜测
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  And then you correct for distance by making assumptions about size.
  然后你通过猜测大小来更正距离
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  If you have two lines
  如果你看到两条线段
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  We'll get in more detail in a second,
  我们等下再更详细的讲
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  but if you have two lines
  但如果你看到两条线段
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  and they take up the same amount of space on your retina,
  它们在你的视网膜上所占空间相同
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  but you believe that one is 100 feet away
  但你相信其中一条距离一百英尺
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  and the other's 50 feet away,
  另一条距离五十英尺
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  the one that's 100 feet away you will see as bigger
  那么你会认为距离一百尺的比较长
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  because your brain will say,
  因为你脑中会想
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  "Well, if it takes up just this much space
  "如果这两条线段都这么长
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  but it's further away,
  但这条距离更远些