Word: err
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Dates: during 1980-1989
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...polygraphs. Critics put the figure much lower. In an upcoming book, A Tremor in the Blood, University of Minnesota Psychiatry and Psychology Professor David Lykken maintains that the most prevalent test is correct only two-thirds of the time, and, more critically, that it is far more likely to err when the person being tested is truthful. Lykken also argues that polygraph sensors-which monitor changes in breathing, pulse rate, blood pressure and the conductivity of the skin as the subject is asked a series of questions-detect not only the physical arousal that accompanies lying, but also the nervousness...