Do polygraphs work and should we keep using them?

You’ve probably seen this device before.  This is a “polygraph” -- which is more popularly known as a lie detector test. But just how often it can catch you in a lie is shrouded in controversy.

Regardless, thousands of polygraphs are given each year in the US, alone, for everything from government clearance screening to witness verification. And the power of these machine’s results is not taken lightly. People have reportedly lost their jobs and even reputations over a failed exam. But how exactly does this machine work, and is it really as accurate as polygraph examiners claim?

To find out, we decided to put the polygraphs to the test ourselves. Polygraph results haven’t been accepted in most state courts since 1923. Mainly because:See the rest of the story at Business Insider

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