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What Is A Lie Detector And How Does It Work?

Rapheal Dee

Mar 29, 2023
A lie detector, also known as a polygraph, is a machine that measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity. The theory behind lie detection is that when a person lies, they will experience a physiological response that can be measured by the machine.
The polygraph was first developed in 1921 by John Augustus Larson, a medical student at the University of California, Berkeley. Larson’s original design was based on the premise that increased autonomic activity would be exhibited when a person was lying. The machine has undergone many changes since its inception and is now considered to be one of the most reliable tools for detecting deception. Read on



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