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Can people beat a Polygraph?

The most popular question people ask is whether one can cheat a polygraph test.

The answer is : NO!

If so, many people would ask how is it possible that in some cases the test was wrong.
The answer is that the polygraph wasn't incorrect, rather the results may have been falsely understood by the polygraph examiner.
In order to prevent such incorrect analyses, the polygraph examiner must be authorized and trained on an international scale.
Trying to fool the polygraph is comparable to a person trying to convince an x-ray that his leg is broken. The polygraph records autonomous and involuntary nerve reactions suffered by the person (sweating, heartbeat, etc.), over which he has no control.

The correlation between correct psychological preparations alongside asking the right questions causes the person to undergo these involuntary reactions enabling the certified examiner to recognize whether he is telling the truth or not.

Many ways of cheating the machine have been tried over the years; however as the polygraph testing advances, supported by a vast amount of available studies and literature, the polygraph examiner is equipped to recognize any attempts at cheating.

In cases where such attempts are identified, the person will automatically fail the test, see "Zeiler Committee" where it was ruled that "the motions, heavy breathing and shaking" of the interrogee (Commander Yoram Levi), albeit repeated requests by the examiner, brought about the failure of the test.

The different ways which are tried to cheat the test are numerous and vary between deliberate movements, changes in breathing, mental and cognitive methods, use of drugs and medication as well as changes in behavior, all of which are studied and identified by experienced polygraph examiners.

Finally, we advise our readers not to try and cheat a polygraph test and to fully cooperate with the examiner, while understanding that not doing so will undermine their integrity.