The truth about lie detectors is that we all really want them to work. It would be much easier if, when police were faced with two contradictory versions of a single event, there was a machine that ...

The polygraph or lie detector test has been in use for over 100 years. It has been heralded as a technological marvel that allows investigators to accurately determine when someone is lying and when ...

Lie detector tests are often treated as truth machines, but they’re far from perfect. In this video, we explain how polygraphs work and why people sometimes pass them even when they shouldn’t. Rather ...