Polygraph Tests

A polygraph, also known as a lie detector, is a device that is used to measure physiological responses during questioning. The idea behind the polygraph is that when people lie, they experience physiological arousal that can be detected through changes in certain bodily functions, such as heart rate, blood pressure, and respiration.

A polygraph test typically involves attaching sensors to the body that measure these physiological responses and asking the person being tested a series of questions. The responses are recorded and analyzed by a trained polygraph examiner, who looks for changes in the physiological measures that may indicate deception.