Polygraph Accuracy/Legality
According to the American Polygraph Association (APA), more that 250 studies have been conducted on the reliability of polygraph testing over the past 30 years. Independent research results of reputable Universities and Academical Institutions worldwide indicate that depending on the polygraph testing and question format used, the sophistication of the polygraph testing instrumentation and the expertise of the polygraphist, results ranging between 85% and 98% can be achieved. This means that for every 100 people examined with the most reliable question technique and quality instrument by an examiner such as ours, the outcome will be that at least 98 of every 100 examinees will yield a 100% reliable result.
The polygraph is still the most reliable manner to establish whether a person is telling the truth in a controlled environment.
There is no law in South Africa prohibiting the use of polygraph testing to establish the truth. It is also not prohibited to be used as evidence in court cases. There are many formal references of such use in the USA. In South Africa it had been used in certain cases in criminal procedures with some success. In labour related cases in South Africa it is frequently used by employers and recogniced in the CCMA.
Most of the instances where polygraph testing results are used for investigative purposes are:
- Loss control and theft by employees or outsiders / visitors
- Fraud and other criminal acts
- Sabotage
- Industrial espionage (Sometimes it is very useful to know employees are not involved)
Polygraph testing is also used in the following areas here and abroad:
- Employee screening and vetting before appointment in sensitive positions
- Periodical testing of employees appointed or serving in sensitive positions.
In screening the following areas may be inquired into (but not limited to):
- Past honesty and undetected dishonesty including theft and fraud (at work)
- Financial burdens or serious debt
- Real reasons for leaving previous employment
- Gambling and other bad habits
- Actual educational levels and experience
- Drug or alcohol abuse
- Criminal acts or tendencies
- Valid drivers licenses
- Actual driving record
- Real reason for applying for this particular position at employer.
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012 667 6537
082 664 6226
