A polygraph (lie detector) works by: ___________?
Correct answer: A. Monitoring physiological indices of autonomic arousal.
- A. Monitoring physiological indices of autonomic arousal.
- B. Directly assessing the truthfulness of a person's statements.
- C. Monitoring the person's facial expressions.
- D. All of the above.
Explanation
A polygraph records autonomic arousal indicators such as heart rate, blood pressure, respiration, and sweating. These reactions do not directly prove whether a statement is truthful, and facial-expression monitoring is not its defining method.
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