Controlled studies of polygraph recordings indicate that they should be most accurately described as detecting _____.
A) parasympathetic activity
B) lies
C) arousal
D) negative emotions

Question

Quizplus · Accepted Answer

Polygraph recordings detect changes in the autonomic nervous system, specifically levels of arousal. This can be in response to a variety of stimuli, including stress, anxiety, fear, and even excitement. While the polygraph is often used to detect lies, it can also detect changes in physiological activity related to other emotions or stressors. Therefore, choice C - arousal - is the most accurate answer.

Controlled Studies of Polygraph Recordings Indicate That They Should Be