Lie detectors are a common part of many television shows and movies.How does the traditional polygraph detector work? Do they appear to actually determine whether a person is lying or not?

Question

Quizplus · Accepted Answer

The Answer is A good answer will include the following key points.
- Polygraphs measure respiration,blood pressure,and palm sweat-autonomic nervous system responses that should increase when someone lies.
- Most research indicates that,while polygraphs are good at measuring autonomic arousal,they are not a valid measure of lying.

Lie Detectors Are a Common Part of Many Television Shows