reliability

Polygraphs: placebo or trial by ordeal?

Chad Dixon, an Indiana man was recently sentenced to 8 months in jail for teaching people how to beat polygraph tests. The sticking point seems to be that polygraphs are used by the US federal authorities for screening applicants and detecting crimes, so if people could get past them they could do all sorts of nefarious things. But the reliability of polygraph tests is highly dubious, and false positives may have stalled many careers. So of course the UK is considering making polygraph testing compulsory for sex offenders, something the blogger Neurobonkers described as a return to trial by ordeal. Is it unethical to teach people to circumvent these tests?

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