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Frequently Asked Questions What is the polygraph? The polygraph is an instrument that measures some of the physiological changes that take place in the human body when a person tells a lie. It is sometimes referred to as a "lie detector". The term "polygraph" originates from the Greek language and literally means "multi writer". This sets it apart from other less accurate devices that only measure one reaction, as opposed to the polygraph's measuring of multiple reactions, allowing for proper comparison and evaluation Can The polygraph help businessmen or managers? The polygraph helps to provide information regarding the integrity of workers quickly and accurately. It can therefore be of great value in the appointment of personnel, as well as in establishing culpability in cases of employee theft or fraud. The polygraph is an invaluable aid in any personnel integrity maintenance program. Accuracy of polygraph results? During the past 75 years, over 250 different studies have been conducted in this regard. The preponderance of available information indicates the polygraph technique to be reliable in as much as 85% to 98% of specific issue investigations. This proves the polygraph to be more reliable than most, if not all other conventional methods of investigation. Does nervousness affect the examination results? The polygraph technique allows for the level of a person's general nervous tension. Most individuals will be nervous before and during a polygraph examination. However, this only affects the level from which recordings are made and does not affect the result of the examination, i.e. although the level of nervousness will affect the individual's physiological baseline, it will not affect the variations on the baseline and consequently the result of the examination. Selecting a polygraph examiner? When a client chooses an examiner, it is very important to ensure that the individual is fully qualified from an accredited polygraph school and is a member of the South Africa Professional Polygraph Association (SAPPA). |
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Phone: 073 2740768 | e-mail: michael [at] polyinc.co.za |
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