Our physical reaction can reviles what we feel. They can also revile when someone is lying. Lie detector or polygraph can identify sudden changes in physical reaction and detect a lie. Edited by As... | more...

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Channels: Others

Tags: Physical reaction to stress and polygraph

Upload by: tubeman on 23-04-2009.

Duration: 2m 57s

Dnatube: Sciencific and Medical video site.