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SSS 2010-06-14

时间:2010-07-12 07:08来源:互联网 提供网友:uv4313   字体: [ ]
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    (单词翻译:双击或拖选)

It’s probably happened to you: a friend says, “I know this place like the back of my hand,” and then proceeds to get you hopelessly lost. Well, it could be that they really did know it like the back of their hand. Because researchers have found that people don’t actually know their hands as well as they think they do. The study appears in the Proceedings1 of the National Academy of Sciences.

 

We all have “mental representations” of our body parts. So when our hands or feet are out of sight, we still know pretty much where they are and what they look like. But just how accurate is our mental picture?

 

Scientists had volunteers place one hand, palm down, under a board. And they asked the subjects to guess, by pointing to the board with their other hand, where their hidden knuckles2 and fingertips lay.

 

The results? Participants thought their hands were about two thirds wider and one third shorter than they really were. And their finger length estimates got worse as they moved away from their thumbs. That’s interesting, because finger sensitivity declines as you head towards the pinky. So our mental body maps seem to reflect our ability to feel. Oh, and for their gripping result, let’s give the researchers a hand.

 

Thanks for the minute, for scientific American’s 60-second-science, I am Karen Hopkin.
 


点击收听单词发音收听单词发音  

1 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
2 knuckles c726698620762d88f738be4a294fae79     
n.(指人)指关节( knuckle的名词复数 );(指动物)膝关节,踝v.(指人)指关节( knuckle的第三人称单数 );(指动物)膝关节,踝
参考例句:
  • He gripped the wheel until his knuckles whitened. 他紧紧握住方向盘,握得指关节都变白了。
  • Her thin hands were twisted by swollen knuckles. 她那双纤手因肿大的指关节而变了形。 来自《简明英汉词典》
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