Posted: 10/28/2001 7:16:52 PM EDT
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anyone ever heard of this? those of you who were LEO, really now, does it work? from what ive read polygraphs arent really "lie detectors" persay, more like a measure of how you react. truth? is there really a reliable way to get by a polygraph? |
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Don't lie? The trick behind the polygraph is the pre-interview where the operator gets you to confess to many things before hand. "Look we're investigating the theft of $1000 from the store's cash register, and you haven't taken that have you? Good, but the detector will pick up deception if you have taken any money from the register in the past. How much money have you taken in the last year?" |
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From what little I understand about it, "lie detectors" most commonly measure levels of skin conductivity or GSR (galvanic skin response). This changes as your "psychological arousal" changes. Generally, when people lie, they become somewhat more tense/emotionally active, and the changes in electrical conductivity can be measured. Problem is, being nervous or startled by a question will also lead to this, so a "lie" detector doesn't actually measure whetehr you lie - it measure something that happens when you lie, but that also happens when you do other things. I only know this because I am looking into measure stuff like this as part of my ongoing research. Pupil diameter is another thing that can be measured that is a good proxy for things like arousal and cognitive load. ... Soon, I'll be like Harrison Ford is Blade Runner - hooking students up to machines and playing mind games with them. MUWHAHAHAHAHA! [:D] |
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All you have to do is train yourself to control your pulse rate and Galvanic Skin Response (GSR) at will, and that means simply controlling your level of excitation and perspiration. In an undergraduate psysiologocal psychology class I trained myself to defeat a polygraph almost 100% of the time. It really wasn't very difficult (for me, at least). |
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Quoted: I only know this because I am looking into measure stuff like this as part of my ongoing research. Pupil diameter is another thing that can be measured that is a good proxy for things like arousal and cognitive load. ... Soon, I'll be like Harrison Ford is Blade Runner - hooking students up to machines and playing mind games with them. MUWHAHAHAHAHA! [:D] WARNING! MAD SCIENTIST![IMG]http://www.theunholytrinity.org/cracks_smileys/contrib/aahmed/biggrin.gif[/IMG] |
| It's childishly easy to fool a polygraph...all you have to do is be calm. Spend some time before the test meditating and calming yourself down, rehearsing the answers you will give to questions they will likely ask. Then just control your breathing and heart rate. I was in the job market before they stopped giving polygraph tests for every little job, and I must have taken a half dozen of them. |
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Quoted: anyone ever heard of this? those of you who were LEO, really now, does it work? from what ive read polygraphs arent really "lie detectors" persay, more like a measure of how you react. truth? is there really a reliable way to get by a polygraph? Yes. I have two friends that were involved in a bad situation. After doing thier time the had to submit to on going ploygraph exams. They read a self help book and beat the polygraphs everytime. |
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[b]Wear 2 pairs of socks,put a thumbtack between the 2,in a place that lets you walk w/it,but when you press down trying to,you get 'poked'.Poke yourself for every question, thereby a consistant reading........just a thought[/b] my uncle was in PD then the DEA for a long time before he died. he told me the exact same thing. also he said that the machine operator would ask him: "Ok Brad, how do you want this one to go?" meaning to you want him to be guilty or innocent. my uncle had all kinds of neet little stories like that. one hell of a guy. thanks DB |
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Quoted: Yes. I have two friends that were involved in a bad situation. After doing thier time the had to submit to on going ploygraph exams. They read a self help book and beat the polygraphs everytime. This one? [img]http://www.deltaforce.com/catalog/media/C-175_Beat_The_Box.jpg[/img] http://[url]http://www.deltapress.com[/url] |