Lie detector tests, or polygraphs, work by comparing your responses to control and relevant questions. You can blur the comparison.

A lie detector test includes more than the time spent hooked up to the polygraph machine. The tester will start making observations the instant a person enters the test center. A skilled polygrapher will notice and record nonverbal cues associated with ly

If you need to cheat a polygraph or lie detector test, make sure to only respond to questions with "yes" or "no," so you don't reveal any details. When you're asked relevant questions, slow your breathing to 15 to 30 breaths ea