Research is identifying alternative methods to the polygraph, but some doubt whether true lie detection is possible.

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, ...

WASHINGTON – The federal government should not rely on polygraph examinations for screening prospective or current employees to identify spies or other national-security risks because the test results ...

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 ...

Madagascar’s leader mandates lie detector tests for ministerial hopefuls in a bold bid to tackle corruption and rebuild trust ...