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ANSWERS: 19
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No, a polygraph is not foolproof, and actually isn't admissable in a US court of law.
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NO! People have taught themsleves to cheat, or even the machine itself isn't more than 89%. And if its a voice stress test, your better off going off gut instinct
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No, it has been fooled many times in many ways.
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"There is no doubt that the polygraph is highly reliable, providing the person using it is properly trained and the technique they use is validated. The American Polygraph Association (APA) has gathered over 200 studies on the subject, you can view further information at their web site http://www.polygraph.org" -http://www.polygraphs.co.uk/lie-detector-testing.asp So unless you can control how your body works, and all the blood pressure and all that, then I guess you can fool it. But I don't think many people can...
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No it happens to be wrong alot. Thats why you cant use it as evidence in a court case.
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Of course not, nothing is fool-proof. Some people can conciously alter the results of any lie dectector if they need to. You can learn it as well.
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Absolutely not and see http://www.answerbag.com/q_view/4276
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It's the truth if you believe it is. Basically they only pick up on changes in blood pressure, sweat, and heart beat. Control the emotions and control the test.
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Absolutely not. The brain controls the body. It has both top down and bottom up control systems. (From 'basal' to 'cerebral' and vice versa). It is anatomically possible and well supported by historical and contemporary existing evidence that conscious control of bodily functions can be achieved. (IE Tibetan Monks). It is most probable that there are individuals naturally able to defeat a lie detector. That is why a lie detector test is a diagnostic rather that evidenciary tool. It is not truly reliable, and anybody can learn to defeat one.
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I know a guy who has to take a lie detector test once a week,and he is capable of fooling it everytime!
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It is a very unreliable tool hence why it is inadmissible in a court of law. You can fool it. Many have. Many things can cause it to read wrong.. blood pressure.. nervousness.. etc. Many have passed a lie detector test who were proven to be guilty later by DNA. Many law enforcement officers that I have ever talked to say that it can be a helpful tool but it is not a tool that should be used to make or break a person.
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You mean 'lie detector test' as in 'polygraph test'? No it's not foolproof! i watch a tv show that showed 2 simple ways how 'to get around' a question.. 1. - Put a pin in your shoe (in you're gonna wear shoes) - Prick you big toe when you have to answer an 'unpleasant' question - You'd feel the physical and chemical change in your body which is then detected by the machine 2. - Squeeze/tighten your butt i haven't had the chance to try out these tricks so i don't know how far they could alter the results
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there are many ways to fool it and it doesn't always read accurately, even when someone isn't trying to trick it.
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No. many factors can off-set the results of a polygraph exam. blood pressure medication, pain and nerve pills will also off-set the results. Trying to beat a polygraph examination will not work. the machine will recognize drugs in a persons system immediately and the test will be terminated. Polygraph exams. are not allowed in criminal court as evidence. A polygraph exam. is only used by the police to eliminate suspects of a crime.
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The short answer is YES. A lie detector measures certain responses to questions, and there are ways to either master those responses ahead of time, or fake them if they don't exist. However, they are constantly being made better so as to make beating them more difficult.
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i heard it could be.
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yes
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I AGREE, HOWEVER AS MENTIONED ABOVE, NOTHING IS FOOL PROOF BUT THE WAY I SEE IT, THE POLYGRAPH IS VERY ACCURATE AND CHANCES ARE THAT WHEN A LIAR TRIES TO FOOL IT, THE POLYGRAPH WILL CERTAINLY BACKFIRE ON A LYING SUSPECT. IT IS QUITE SIMPLE; IF YOU PASS, YOU ARE TELLING THE TRUTH. IF YOU FAIL, YOU OBVIUOSLY ARE LYING....
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No, lie detectors have been proven to be inaccurate and can be fooled. Unfortunately many people aren't aware that the polygraph is more psuedoscience than science. A good study on this, “Forensic “Lie Detection": Procedures Without Scientific Basis,” was written up in the peer reviewed Journal of Forensic Psychology Practice. As Bob Park, the well known debunker of pseudoscience puts it, "The polygraph, in fact, has ruined careers, but never uncovered a single spy." See here for clarification: http://www.ukskeptics.com/polygraph.php
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