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The polygraph was on the Encyclopædia Britannica 2003 list of greatest inventions, described as inventions that "have had profound effects on human life for better or worse."

A polygraph examination is also referred to as a psychophysiological detection of deception (PDD) examination. Psychophysiological detection of deception examination are designed to analyze the physiological reactions of subjects.

Polygraph examiners, or polygraphers, are regulated by various regulating bodies, such as the American Polygraph Association whom sets standards for courses of training of polygraph operators.

In South Africa, polygraphs are used as an interrogation tool with criminal suspects or candidates for sensitive public or private sector employment. Large corporations has also seen the benefit of utilizing the Polygraph for various applications; such as preemployment, pre-promotion and annual screening as part of their risk management.

The CCMA and other labour dispute resolution bodies have over the past decade become more familiar and acceptable towards the Polygraph.

A polygraph, popularly referred to as a lie detector, measures and records several physiological indices such as blood pressure, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions.

The belief underpinning the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiated from those associated with nondeceptive answers. The polygraph was invented in 1921 by John Augustus Larson...

A medical student at the University of California, Berkeley and a police officer of the Berkeley Police Department in Berkeley, California.