Lie detector

Also known as a lie detector, a polygraph is a scientific device that monitors an individual’s psychophysiological responses, recording relative changes in selected physiological attributes, such as:

  • arterial blood pressure,
  • pulse rate,
  • respiration rate patterns,
  • galvanic skin response (electrodermal activity)

During a polygraph examination, the subject is asked a series of carefully selected questions, specially prepared to induce psychophysiological responses, which are continually recorded by the polygraph. Both the examination procedure and the subsequent interpretation of the subject’s responses are always carried out by professionally trained experts – polygraph examiners.

Result of polygraph examination

Did you know, that…

  • …the first polygraph (lie detector) was invented as long ago as in 1922?
  • …the polygraph is considered to be one of the most significant scientific inventions of all time?
  • …the reliability of state-of-the-art polygraphs is over 98 per cent?
  • …polygraph examinations are carried out under carefully defined conditions and exclusively by specially trained polygraph examiners so as to ensure utmost precision?
  • …all examined subjects have to be informed in advance of all the questions they will be asked during the examination process?
  • …polygraphs measure psychophysiological reactions that cannot be consciously controlled?


Polygraph Equipment

We are using the newest type of polygraph: LX 5000-SW. The computerized Polygraph LX5000-SW is the world’s most advanced polygraph (lie detector) designed to record, store, and analyze physiological changes during a polygraph examination. With the basic system a total of nine channels can be recorded at one time. More informations about polygraph equipment can be found on our polygraphs product page

Equipment for poolygraph LX5000-SW


Polygraph Examination

A typical polygraph examination will include a period referred to as a:

  • pre-test interview
  • chart collection phase
  • test data analysis phase

During the pre-test, the polygraph examiner will complete required paperwork and talk with the examinee about the test, answering any questions the examinee might have. It is during this phase that the examiner will discuss the test questions and familiarize the examinee with the testing procedure.

During the chart collection phase the examiner will administer and collect a number of polygraph charts. The number of questions and the number of charts will vary, depending on the number of issues and technique employed.

Following this, the examiner will analyze the charts and render an opinion as to the truthfulness of the examinee.

The examiner, when appropriate, will offer the examinee an opportunity to explain physiological responses in relation to one or more questions presented during the test.

Polygraph Examination


Offered Services

Our range of services focuses on polygraph examinations for the purpose of lie detection (distinguishing truthful answers from deceptive ones). Such examinations are typically required by:

Polygraph examiner training

Become a polygraph examiner

Argo-A Security EU offers, as the first company in European Union, special education in polygraphology through well-known and accredited international polygraphological school – Chicago Polygraph Institute.

Basic course – Polygraph examiner training – is led by experienced trainers, members of International League of Polygraph Examiners, American Polygraph Association and the training is provided by accredited organization Chicago Polygraph Institute. Polygraph examiner training is guaranteed by one of the most experienced and well-known polygraph examiners in Europe, and the most frequently mentioned and quoted polygraph examiner by the media worldwide – Dr. Andriy M. Volyk.

Applicants must meet strict education, ethics, and moral requirements and will be also interviewed. Moreover, they must be of excellent character and reputation, and have no felony or misdemeanor convictions.

Polygraph Examination Training


What is Polygraph?

The polygraph (lie detector) is a scientific instrument capable of simultaneously recording changes in several physiological variables such as blood pressure, pulse rate, respiration, electrodermal activity, and others, while the subject is asked a series of questions pertaining to a specific issue under investigation. The charts (polygrams) generated during the polygraph examination are interpreted by a polygraph examiner. The literal meaning of the word “polygraph” is “many writings”.

Some information for this section/chapter was taken from Argo-A Security website in compliance with the permission of Dr. Andrii M. Volyk