Lie Detector

You can't hide from a LIE!

The Inventor of the Lie Detector was....John Larson

John Larson was a medical student who went to the University of California. He invented the Lie Detector in 1921. The Lie Detector is still used by psychologists today.

Lie Detector Theory Today

The Lie Detector is used for people that have done cruel things in the U.S. When they use the Lie Detector, they attach different sensors to your body. When the person lies the lying causes certain amounts of stress signals. Such as, breathing rapidly, blood pressure, pulse and persperation. The polygraph records all this on a piece of graph paper with a pen.

John Larson and the Lie OTHER PEOPLE