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POLYGRAPH TESTING -
LIE DETECTOR TESTS
Polygraph Lie - Detector Examination
We are able to provide polygraph lie detector services either at your
premises or a convenient location in Spain or the United Kingdom.
The polygraph has been successfully used as
an effective tool for verifying truthfulness and lie detection for many
years. Countries such as Spain, USA, Canada, Japan, South Africa,
Australia and many of the new members of the European Union use the
Polygraph for law enforcement testing, National security, Fraud and
Pre-employment screening.
Although the polygraph is not used in court proceedings in most of these
countries, it is used as an effective tool to show deception in a person
and further support corroborating evidence.
Polygraph - Lie Detection
FAQ
Q. Is there any
difference between a Polygraph and a Lie Detector?
A. No?
Q.
How Does the
Polygraph (Lie Detector) Work?
A. The polygraph works by tracing changes in a person's physiological
conditioning during questioning. These changes are recorded directly on to the
polygraph charts during testing in order that they can be reviewed. Some of the
changes that occur may replicate those that have been linked with truth or
deception for many years. These physiological changes have been the subject of
various research projects and qualified Polygraph test examiners have
undertaken many hours of polygraph testing and chart analysis instruction to
interpret them.
The Polygraph charts are generated
by attaching four components to the subject.
Pneumograph
Two convoluted rubber pneumograph tubes are placed around the subject's upper
chest and abdomen on the outside of their clothing, these test and record
respiration and movement.
G.S.R
The GSR or Galvanic Skin Response is produced by placing two finger plates
across fingers on one of the subject's hands. These trace changes to the skin
resistance during the Polygraph testing and examination.
Cardiosphygmograph
This component traces changes to the subjects relative blood pressure and pulse
rate and it is similar to the pressure cuff your doctor uses when taking your
blood pressure.
After the questions have been asked with the subject attached to the polygraph
the testing examiner will read the generated charts to establish truth or
deception. The agreed questions will always be asked at least twice.
Q. How reliable is Polygraph Testing?
A. There is no doubt that the polygraph is highly reliable, providing the
person using it is properly trained and the technique they use is validated.
The American Polygraph Association (APA)
has gathered over 200 studies on the subject.
All of our polygraph examiners are members of the
APA.
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