A polygraph, also commonly referred to as a “lie detector”, works by measuring and recording the examinee’s entire autonomic nervous system. In other words, everything that a person cannot control. Whenever you tell a lie, your body will give it away. There is no such thing as a “big lie” or a “small lie”. A lie remains a lie. It is the combination of a device and procedure that measures and records several physiological indicators such as changes in relative blood pressure and pulse, respiration and skin conductivity whilst a person is asked and answers a series of questions.
It consists of pre-interview, data acquisition and data analysis phases.
The duration of a polygraph test is usually 90 minutes, and it should be conducted in a controlled environment, free from external disturbances and disruptions.
Polygraph should not be confused with Computerized Voice Stress Analysis (CVSA), Layered Voice Stress Analysis (LVSA), Voice Stress Analysis (VSA), “Bio-Feed”, “Voice Polygraph” or by any other name. Make sure that you make use of the “Real McCoy!”
