Answer» Correct Answer - Option 2 : lie detection
The correct answer is lie detection. - Polygraph is a device commonly used by law enforcement agencies for lie detection.
- It is a device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while a person is asked and answers a series of questions.
- The belief is that the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers.
- Instruments like cardio-cuffs or sensitive electrodes are attached to the person for the test.
- A numerical value is assigned to each response to conclude whether the person is telling the truth, is deceiving, or is uncertain.
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