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, ...

Jerry Lewis, a retired New Jersey State Police lieutenant who has been administering polygraphs since 1981, joins host Matt Adams to peer inside the mechanics of the test. They explore the science at ...

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 ...

The lie detector is back — and it gets personal fast. From “Are you horny right now?” to “Did you ever have a crush on my ...

Gary Coleman’s ex-wife has failed a voluntary lie detector test about the circumstances surrounding his death. The polygraph examination was conducted as part of an ongoing investigation into the ...

Alex Murdaugh failed a polygraph test administered as part of the plea agreement for the disgraced former attorney's raft of financial crimes, violating the deal, which required his truthfulness, ...

Republican Sen. John Kennedy of Louisiana sarcastically remarked during a Saturday night appearance on Fox News that Vice President Kamala Harris could cause a polygraph machine to blow up by simply ...

A version of this story appeared in CNN’s What Matters newsletter. To get it in your inbox, sign up for free here. When President Ronald Reagan’s White House threatened thousands of government ...