Voice Stress Analysis

Precision Polygraph of Texas (“PPoT”) does not use, provide, or endorse Voice Stress Analysis.

It only supports ways to detect truth that are supported by valid scientific evidence. And that is with polygraph equipment.

Police departments across the country have been buying these controversial devices, which claim to whether a person is lying merely by the sound of their voice.

It is cheaper and faster than the polygraph. but "Voice stress analysis is a fraud. It has zero validity," said David T. Lykken, a psychology professor emeritus at the University of Minnesota in Minneapolis and author of the book "A Tremor in the Blood: Uses and Abuses of the Lie Detector."

A 1996 Department of Defense Polygraph Institute study of the CVSA found that the device performs no better than chance in detecting deception. In other words, guessing or flipping a coin would be as accurate as the test. Based on this study, the Department of Defense, the Central Intelligence Agency and the Federal Bureau of Investigation do not use voice stress tests. Another analysis from the Journal of Forensic Sciences sates the same thing.

See this 15 minute ABC news expose on this topic.

Another alternative to polygraph is Eye Movement Detection. PPoT does not use either of these methods.