Leonarde Keeler (left) testing his polygraph machine on Marjorie Creighton in presence of August Vollmer during a trial in Chicago in 1932. Staff Writer In advance of her appearance on Thursday before ...

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 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 ...

U.S. interrogators turned an al Qaeda terrorist into a human polygraph machine while investigating the bombing of the USS Cole – an attack whose eleventh anniversary is today. What has since happened ...