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, ...

The Federal Bureau of Investigation (FBI) has found itself embroiled in a rather odd situation involving polygraph tests. In April, it confirmed to NPR that it was using these tests to catch personnel ...

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 ...

Summary: Engineers and physicians developed a miniature, wireless polygraph system that is worn as a soft, lightweight ...

She was one of the brightest students at a leading university when the Central Intelligence Agency offered her a job as a counter-terrorism analyst. But first, the 19-year-old was warned, she had to ...

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 ...