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 ...

WASHINGTON—In a small interrogation room in Virginia with a one-way mirror, employees from across the Department of Homeland Security are being summoned and hooked up to a polygraph machine. They are ...

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