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?

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!

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 ...

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 ...

When your boss asks you to take a lie detector test, do you have to do it? Should you do it? Read on to learn your rights and one lawyer's advice.

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

Popularly known as the “lie detector,” the device transformed police work, seized headlines and was extolled in movies, TV and comics as an infallible crime-fighting tool.