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SSS 2011-02-08

时间:2011-03-04 03:46来源:互联网 提供网友:yw7514   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American’s 60-Second Science. I’m Christopher Intagliata. Got a minute?

Walking through airports, you’ve probably crossed paths with a few K-9 cops. But those dogs aren’t just following their noses. They may be led astray by where their handlers think drugs and explosives are hiding, too—even when there aren’t any. That’s according to a study in the journal Animal Cognition.

The researchers recruited 18 dogs certified1 by law enforcement agencies. As a test site, they used four rooms in a drug-and-explosive-free church. The researchers left the first room untouched. In the second, they taped up a sheet of red paper. In the third, they hid a few Slim Jims as a decoy. And in the fourth, they taped red paper to a stash2 of Slim Jims.

The dog handlers were told they might encounter the scent3 of pot or gunpowder4 up to three times per room, sometimes marked with red paper. It was a flat-out lie—there were no target scents5. But the dog teams still called 225 false alerts—most often at the site of the red paper, whether there were Slim Jims there or not.

The study doesn’t mean K-9 cops are totally unreliable in the real world. But it does imply that the dogs aren’t immune to the power of suggestion—and neither are their handlers.

Thanks for the minute. For Scientific American’s 60-Second Science, I’m Christopher Intagliata.


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1 certified fw5zkU     
a.经证明合格的;具有证明文件的
参考例句:
  • Doctors certified him as insane. 医生证明他精神失常。
  • The planes were certified airworthy. 飞机被证明适于航行。
2 stash zFmya     
v.藏或贮存于一秘密处所;n.隐藏处
参考例句:
  • Stash away both what you lost and gained,for life continues on.将得失深藏心底吧,为了那未来的生活。
  • That's supposed to be in our private stash.这是我的私人珍藏。
3 scent WThzs     
n.气味,香味,香水,线索,嗅觉;v.嗅,发觉
参考例句:
  • The air was filled with the scent of lilac.空气中弥漫着丁香花的芬芳。
  • The flowers give off a heady scent at night.这些花晚上散发出醉人的芳香。
4 gunpowder oerxm     
n.火药
参考例句:
  • Gunpowder was introduced into Europe during the first half of the 14th century.在14世纪上半叶,火药传入欧洲。
  • This statement has a strong smell of gunpowder.这是一篇充满火药味的声明。
5 scents 9d41e056b814c700bf06c9870b09a332     
n.香水( scent的名词复数 );气味;(动物的)臭迹;(尤指狗的)嗅觉
参考例句:
  • The air was fragrant with scents from the sea and the hills. 空气中荡漾着山和海的芬芳气息。
  • The winds came down with scents of the grass and wild flowers. 微风送来阵阵青草和野花的香气。 来自《简明英汉词典》
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