Polygraph refers to a mechanical device used to measure and record people's physiological responses, such as heart rate, blood pressure, circulation respiration, and galvanic skin response. It is a devide used to detect deception in crime suspects. When Polygraph or Polygraph machine is used in "lie detection", the Polygraph Operators attempt to tell if someone is lying by observing how that person responds physiologically while answering questions Polygraph is commonly called a Lie Detector


List of books: Polygraph

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