To oversimplify, the polygraph test works by telling how nervous you are, as measured by things like your heartrate, breathing, and sweat, and compares your readings when you answer a question to those when you tell a known lie and a known truth.

Brain imaging lie detector can be beaten with simple techniques Date: May 3, 2019 Source: University of Plymouth Summary: Researchers have shown that a functional magnetic resonance imaging (fMRI ...

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