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2018下半年大学英语六级考试听力讲座原文及解析
Recording One
TodayI'm going to talk about a very special kind of person. Psychologists call themmasters of deception. Those rare individuals with a natural ability to tellwith complete confidence, when someone is telling a lie. (16) For decades, researchers and lawenforcement agencies have tried to build a machine that will do the same thing.Now, a company in Massachusetts says that by using magnetic brain scans,they can determine with 97% accuracy whether someone is telling the truth.
Theyhope that the technology will be cleared for use in American courts by earlynext year. (17)But is this really the ultimate tool for you? The lawyers oftomorrow? You will not find many brain scientists celebrating thisbreakthrough. The company might be very optimistic, but the ability of theirmachine to detect deception has not provided credible proof. That'sbecause the technology has not been properly tested in real world situations. Inlife, there are different kinds of lies and diverse contexts in which they'retold. These differences may elicit different brain responses.
Doestheir hypothesis behind the test apply in every case? We don't know the answer,because studies done on how reliable this machine is have not yet beenduplicated. Much more research is badly needed. Whether the ...
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