Lie detectors measureSelect one:a.general emotional arousal.b.muscular responses.c.feelings such as guilt and anger.d.a physically unique "lie response."

Break Down the Problem

1. Identify the purpose of a lie detector.
2. Determine what physiological measures are typically monitored by lie detectors.

Relevant Concepts

• Lie detectors, or polygraphs, typically measure physiological responses that may indicate emotional reactions related to deception.

Analysis and Detail

1. General Emotional Arousal: Lie detectors measure physiological responses such as heart rate, blood pressure, and galvanic skin response, all of which can indicate emotional arousal.
2. Muscular Responses: While there may be some correlation with muscle tension, this is not the primary focus of lie detectors.
3. Feelings such as Guilt and Anger: These are subjective emotional states, and while the polygraph aims to infer these feelings, it does not measure them directly.
4. A Physically Unique "Lie Response": There is no universally recognized "lie response." The physiological changes can occur for various reasons not related to lying.

Verify and Summarize

The most direct measure that lie detectors aim to capture is general emotional arousal, as it encompasses the physiological responses that indicate stress or anxiety, potentially tied to deception.

Final Answer

a. general emotional arousal.