Polygraph

D-tect® intelligence & investigations in Israel

What is a polygraph?
A polygraph is a device which it’s purpose is to assist us find out if the interrogatee is being truthful or not. A polygraph test can be used to a specific inquiry or a general credibility check.
The polygraph invention occurred at the 20th century 20’s, and it’s working on the principle of reading physical reactions.

How the test is being executed
The person being interrogated is attached by electrodes that indicate on in-voluntary physical reactions that indicate if the person is telling the truth.
It’s common believe that a person that is lieing, his in-voluntary physical changes that occur in the body, can be read by the polygraph machine, changes like: rised blood pressure, faster pulse and more.

When do we use the polygraph?
The most common use of the polygraph is by policemen on criminal investigations. Nowadays, however, a lot of companies and organizations in the private sector make potential workers to go through a polygraph test, especially in the fields of money, security or military.
A polygraph test is usually conducted by authorized personal; a security company or investigation companies.
Insurance and credit card companies use the polygraph when they sue or they’re being sued.

Do you need a court confirmation to perform a polygraph test?
The court can order on a polygraph test in the process of an ongoing investigation or case.
In the case that a communal institute wants the test as part of a pre-employment check, there is no need for a court order, the company in question can do as it wants.

Why do a polygraph test?
A polygraph test can assist uncover untrue information or confirm reliability.
Some businesses conduct periodic obligatory polygraph test for the entire staff as a way to warn them, and in order to intimidate them.

What kinds of questions are asked in a polygraph test?
Different kinds of questions, depends on what kind of information one wants to know.

Can anybody conduct the test?
A polygraph test must occur at an authorized location.
A police investigator does all police related tests, but workers testing or interrogation related tests are done by an investigation office.