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| rdfs:comment | - A polygraph (Greek for "many writings," reflecting the multiple readings that are recorded simultaneously) (popularly referred to as a lie detector) is an instrument that measures and records several physiological responses such as blood pressure, pulse, respiration, breathing rhythms, body temperature, and skin conductivity while the subject is asked and answers a series of questions, on the theory that false answers will produce distinctive measurements. The polygraph measures physiological changes caused by the sympathetic nervous system during questioning.
- A polygraph or lie detector is a device that measures and records several physiological responses such as blood pressure, pulse, respiration, breathing rhythms and body temperature while the person is subjected to a series of questions. It is believed that that false answers will produce distinctive measurements on the device.
- A polygraph (commonly and inaccurately referred to as a "lie detector") is a device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions are being asked, in an attempt to detect lies. The above measurements are posited to be indicators of anxiety that accompanies the telling of lies. Thus, measured anxiety is equated with telling untruths. However, if the subject exhibits anxiety for other reasons, a measured response can result in unreliable conclusions.
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| abstract | - A polygraph (commonly and inaccurately referred to as a "lie detector") is a device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions are being asked, in an attempt to detect lies. The above measurements are posited to be indicators of anxiety that accompanies the telling of lies. Thus, measured anxiety is equated with telling untruths. However, if the subject exhibits anxiety for other reasons, a measured response can result in unreliable conclusions. A polygraph test is also known as a psychophysiological detection of deception (PDD) examination. The original polygraph was invented by John A. Larson.
- A polygraph (Greek for "many writings," reflecting the multiple readings that are recorded simultaneously) (popularly referred to as a lie detector) is an instrument that measures and records several physiological responses such as blood pressure, pulse, respiration, breathing rhythms, body temperature, and skin conductivity while the subject is asked and answers a series of questions, on the theory that false answers will produce distinctive measurements. The polygraph measures physiological changes caused by the sympathetic nervous system during questioning.
- A polygraph or lie detector is a device that measures and records several physiological responses such as blood pressure, pulse, respiration, breathing rhythms and body temperature while the person is subjected to a series of questions. It is believed that that false answers will produce distinctive measurements on the device.
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