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Edited by Noah Shachtman | Contact

Jihadist Site: How to Beat the Polygraph

Everyone knows the polygraph is an inexact tool, at best. That includes Islamic extremists, too.

polygraph-testing-man.jpgAccording to the lie detector skeptics over at AntiPolygraph.org, this article, published in a jihadist magazine and on an Al-Qaeda affiliated site, tells Islamic extremists how to beat the machine. So why does "the U.S. intelligence community continues to place great reliance on polygraphs in assessing the credibility of prisoners, agents, informers, and even its own employees?" AntiPolygraph asks.

...The control questions are a group of questions that the interrogator asks the mujahid and the answers to which are known by both parties. The interrogator presents these questions to the mujahid and asks him to answer them, and meanwhile, the device records what are considered the natural heart, blood pressure, breathing, and perspiration rates, which will be compared with those that will be recorded during the real interrogation questions. If the mujahid is upset during when answering the interrogation questions, these physiological rates will change, and that will be considered an indication that he is lying.

If you know this, my brother mujahid, then you know that the “control questions” are among the most important stages the mujahid undergoes during interrogation with this device, and he must know how to deal with them as will be explained shortly.

The first thing that must sink into the mujahid's head is that the aforementioned physiological changes can occur for reasons other than lying such as nervousness, anger, sadness, embarrassment, fear, relaxation, and so forth. Cold, headache, and constipation may also cause changes in them. All this greatly diminishes the importance of the test results.

And don't suppose that experts can tell the difference between changes caused by lying and changes caused by other factors: up to now this has not been proven.

In many tests, truth-tellers fail and liars pass. Some people may show symptoms – such as fear, for example – during the test, and so the device indicates that they are telling the truth [sic] even though they are honest. And many liars pass the test...

Researchers have been scrambling for years to build a better alternative to the standard polygraph. So far, the results haven't been particularly encouraging.

Comments

I think perhaps that if we have a suspect terrorist and major damage of us property is related to or suspect to the activities that it falls under the nationa securites act. There are no rights for that person except bread and water. Maximum security in a 4 by 7 cell with no toilet, a hole to poop in. No outside contact and no mail or tv. Permanant extradition and revoking of citizenship rights.Possibly several years before extradition is even allowed by the courts to take place. Slow em down a little. Don't be so ready to set em free. Polygraph? No! You are giving them intel on why you are detatining them, if they have no idea why that is a good thing. Who cares if they lie or attempt it. If you keep em on ice they have no chance of escape and doing no more damage to the mass public. Three words for you
Guantanamo
Bay
Cuba
Need I say more?

Posted by: Max Anderson at February 7, 2007 12:02 AM


I work for one of the best polygraph examiners in LA. I understand that sometimes the cops and examiners who work for the department lie to the suspects. Surprise, surprise. Do ya think maybe the examiner lied to you? Maybe he knew you were innocent but they were trying to get you to confess just in case you were one of the few who test false negative, or one of the few who test false positive. Or maybe the test came up inconclusive. Maybe the guy didn't know how to do a test properly. We've proven four guys innocent in the last couple of months including one who was mentally ill. We got a teacher found innocent who was unjustly accused of sexual harrassment of another teacher. We've won civil cases; instead of just he said/she said the people could prove they were telling the truth. We gave one young woman great joy because she could take the results of the polygraph to her mother who didn't believe she had been molested.

Posted by: Sunny at February 21, 2006 4:29 PM


The Slate article actually tells us very little about the difficulty of beating the polygraph. Note that the polygrapher was in a position to know whether or not the author had taken the money before the polygraph was administered. A hand signal or a silent page from the polygrapher's partner could have tipped him off. It's doubtful that the polygrapher, knowing that he's polygraphing a writer, would leave such things to chance. Yoffe's anecdotal tale is no substitute for a controlled, double-blind experiment, and it's not safe to make any inferences about the difficulty of fooling the polygraph based on it.

Posted by: Anonymous at January 18, 2006 6:28 AM


Someone kicked down my neighbors door one day. I had heard it (it was early in the morning and I was asleep). I didnt think much of it.

The police asked me to take a lie detector test.

I complied and they gave me a polygraph test. They started asking me questions trying to implicate me in robbing my neighbor. Totally ridiculous.

At the end of it the officer who gave me the test said that I had failed. He said I had either done it, or knew who had done it. I told him his technology was faulted and I am only taking the test because the police had asked me and I wanted to cooperate in helping as much as they wanted me to.

Take it for what its worth. They dont work. That was 4 years ago, maybe they have improved.

Posted by: rit at January 16, 2006 9:36 PM



While lie detectors leave much to be desired,
they aren't as easy to beat as often claimed.

Here's an example of a normal person using the
same tricks mentioned in the article (and
failing):

http://fray.slate.com/id/2112734/

-Tim

Posted by: Tim at January 16, 2006 2:01 PM


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