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An instrument designed to detect when a person has answered a question falsely.
an instrument that produces a record of the changes in certain body activities, as blood pressure, pulse, and breathing, which may be interpreted to indicate the truth or falsity of a person's answers under questioning.Also called polygraph.
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|Noun||1.||lie detector - a polygraph that records bodily changes sometimes associated with lying|
electrical skin response, electrodermal response, Fere phenomenon, galvanic skin response, GSR, psychogalvanic response, Tarchanoff phenomenon - a change in the electrical properties of the skin in response to stress or anxiety; can be measured either by recording the electrical resistance of the skin or by recording weak currents generated by the body
polygraph - a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration)