What is the polygraph instrument also called

What then is the use of polygraph instrument?An instrument for making a graphic record of the changes in blood pressure and pulse and respiration rate of someone being questioned under or as if under suspicion of guilt.A canadian psychologist, john a.The polygraph instrument, erroneously called a 'lie detector', is nothing more than a monitoring device to record different physiological systems.While most of us adapted to the new technology, one well.A polygraph used for the purpose of lie detection is an instrument that monitors and records various manifestations of the sympathetic and parasympathetic nervous systems while a series of carefully designed questions is asked of the person who is attached to the instrument.

The term polygraph actually means poly=many;In addition, it is an instrument that measures a person's psychological response when they are asked a question to test if the answer is truthful or not.The polygraph read and charted blood pressure, respiration, and pulse.An instrument for receiving and recording simultaneously tracings of variations in certain body activities.The instrument typically used to conduct polygraph tests consists of a physiological recorder that assesses.The first polygraph was developed in 1908 by a british doctor to monitor a mother's physiology during labor contractions.