Lie Detector

Topic

A lie detector, scientifically known as a polygraph, is a device that measures and records physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while a person is asked a series of questions. It operates on the theory that deceptive answers will produce distinctive physiological responses that can be differentiated from those associated with truthful statements. Despite their popular use, polygraphs are widely considered by the scientific community to be unreliable and pseudoscientific.