Polygraph

American inventor Leonarde Keeler (1903–1949) testing his improved lie-detector on Dr. Kohler, a former witness for the prosecution at the 1935 trial of Bruno Hauptmann.

A polygraph, popularly referred to as a lie detector, measures and records several physiological indices such as blood pressure, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions. The belief underpinning the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers; the polygraph is one of several devices used for lie detection.

单词	Polygraphy
释义	Polygraphy 英语百科 Polygraph A polygraph, popularly referred to as a lie detector, measures and records several physiological indices such as blood pressure, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions. The belief underpinning the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers; the polygraph is one of several devices used for lie detection.
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Polygraphy

Polygraph