Add Yahoo as a preferred source to see more of our stories on Google. American inventor John Larson, right, demonstrates the operation of a polygraph at Northwestern University in Evanston, Illinois, ...

In Season 8, Episode 10 of "The Simpsons" — an episode parodying the popular 1990s sci-fi thriller "The X-Files" — Homer Simpson is being questioned by two federal agents at a police station. "This is ...

The polygraph is not a lie detector but rather an instrument that measures a person’s physiological changes to questions posed by the examiner. An elevated physiological response to a particular ...

Further spurred by another negative polygraph experience, the resulting deep dive on polygraphs and examination methods ...

CLEVELAND, Ohio - In Hollywood, polygraph machines help dogged detectives sort through the lies and get to the truth. For Northeast Ohio law enforcement agencies, the reality is much different. Many ...