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How do lie detector tests work and how accurate are polygraphs?

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How do lie detector tests work and how accurate are polygraphs?

LIE detector tests have become a sure fire way for Jeremy Kyle guests or Love Island contestants to find out how their partner really feels.

But how exactly do they work? And should you trust them?

Lie detectors are also known as polygraph tests and use questioning techniques along with technology to record physiological functions to get the truth
Alamy

How do lie detector tests work?

A number of sensors are attached to the body in an attempt to determine whether someone is telling the…

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