Lie detector expert reveals how a polygraph works - as he gives his verdict on The Jeremy Kyle Show's use of the tests I took deep breaths and tried to remain calm - but the machine caught me lying!

Polygraph tests can supposedly detect when a person is lying. But how can a machine do that, and can we really trust the results they provide?

Is the Jeremy Kyle lie detector accurate? Science behind how polygraph machines work The Jeremy Kyle show was taken off air on Monday after a show contestant tragically died from suicide after ...

Learn how a lie detector, or polygraph, works by measuring physiological functions during police interrogations.

How does a lie detector work? Lie detectors work on the principle that anyone who’s lying will be nervous, and nervous people tend to produce more adrenaline, which makes their hearts beat ...

Lie detectors work on the principle that anyone who is lying will be nervous, and they tend to produce more adrenaline which makes their hearts beat faster, their skin temperature go up and makes ...

There are calls for a US Supreme Court nominee to take a lie detector test. But do they work?

How a lie detector test works An increasing number of companies in India are offering lie-detector tests to individuals and companies trying to catch out deceitful spouses and cheating employees.