Most Americans have never been subjected to a polygraph, and that’s in large part because Congress acted to largely outlaw them from use in the public sector in 1988, a time when millions of Americans ...

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 ...

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 ...