How accurate are the lie detector and paternity tests on the TV talk shows?
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I want to know if many of the lie detector and paternity tests on the Maury,Steve Wilko, and various television talk shows are faked. For instance, I learned that a lie detector test ...show more
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Answer:
There is no such thing as a lie detector. They are officially called Polygraph machines. They measure changes in heart rate, respiration and blood pressure. The theory is that when you lie your heart rate increases, your breathing becomes irregular and your blood pressure goes up however other factors can also affect those things. Polygraph operators swear that they can adjust the machine to ignore those other factors but you really just have to take their word for it. Courts won't allow polygraph results to be used as evidence because they are unreliable. That should tell you something. I personally have had employees tested. When one failed I sent them to another polygraph operator and he passed the same person for the same questions. On the other hand, DNA paternity tests are extremely reliable. In most cases, the chance of their being wrong is 1 in hundreds of thousands. They are accepted in court and are accepted as accurate by 99% of scientists.
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Other answers
It's not reliable at all. Come on even news broadcasters are full of rubbish. Lie detectors? There is irony in itself.
Experienced Young Man
Polygraphs (lie detectors) have never been scientifically proven to be accurate. However, the DNA testing is OVERWHELMINGLY accurate!
LadyB
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