Sunday, 22 April 2007

Why Lie??

The polygraph machine is commonly known as the lie detector, which does exactly what it called,
How does it work?
Well, it measures stress levels, when a person responds to set questions. The high spikes on the polygraph indicates the lying.
However the polygraph test is only 98% accurate, so therefore this not normally used as evidence in court.

The link below tells you more about the polygraph machine, and how it works and the advantages and disadvantage of the machine.

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