SSS 2011-02-08
时间：2019-01-08 作者：英语课 分类：Scientific American(二)月
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 certified 1 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 stash 2 of Slim Jims.
The dog handlers were told they might encounter the scent 3 of pot or gunpowder 4 up to three times per room, sometimes marked with red paper. It was a flat-out lie—there were no target scents 5. 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.
- 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。
- 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。
- 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。
- 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。