About Kavod Polygraph Services
CHRIS PORTER
Forensic Psycho-physiologist (Dipl. PDD)
www.kavodpolygraphservices.co.za
chris@kavodps.co.za
082 418 6616
From Founder
- American Polygraph Association (APA)
- Southern African Polygraph Federation (SAPFED)
- South African Professional Polygraph Association (SAPPA)
- Private Security Industry Regulation Authority (PSIRA)
- International Association of Financial Crimes Investigators (IAFCI)
Polygraph/ˈpɒlɪɡrɑːf/noun A machine designed to detect and record changes in physiological characteristics, such as a person’s pulse and breathing rates, used especially as a lie detector.
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 pre-employment, 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 non-deceptive 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. The polygraph was on the Encyclopædia Britannica 2003 list of greatest inventions, described as inventions that “have had profound effects on human life…”.