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How Do Polygraph Machines Work? [How to]
posted November 4 2013 13:06.08 by spic0m

Also known as 'lie detectors,' polygraphs are used to record an individual's vital signs, such as breathing rate, pulse, and so forth. Check out this episode of BrainStuff to learn more about polygraphs and the art of lie detection.

[Link: BrainStuff]

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