How does a lie detector test work?

Frequently asked questions

How does a lie detector test work?

The process of a loyalty test or lie detector test
Everyone probably knows a lie detector test like this from a movie and it works in a similar way in practice. A lie detector test via app or on the phone is not possible. We use professional ones Polographs, which can detect lies through minimal body signals and reactions.
  • First, an appointment and a preliminary discussion are necessary.
  • We need your questions in advance. Sometimes additional background knowledge is helpful for the examiner to use effective questioning techniques.
  • The person to be tested is connected to the polygraph (lie detector), which measures reactions and signals such as breathing, pulse, body temperature and skin resistance.
  • After a few general questions, the polygraph examiner (experienced person for a lie detector test) asks the questions that are important to you.
  • The detailed recording of the polygraph is evaluated directly on the spot. You know immediately what was a lie and what was the truth.

In the preliminary telephone conversation, we discuss the aim of the test and which questions should be answered. The tester will prepare accordingly and ask your decision questions in an expert manner after a few test questions have been asked. A quiet environment is a prerequisite.

Make an appointment? Or do you have further questions? We are happy to provide answers by phone, WhatsApp or email.

The process of a lie detector test varies depending on the procedure used and the purpose of the test. In general, however, it is a matter of that a person answers questions while their physiological reactions are recorded. This can include heart rate, skin conductivity, breathing and other factors. The recordings are then analyzed by an expert to look for signs of inconsistencies in the person's answers.

Again in detail: The test subject is informed about the procedure and purpose of the test. He is then asked to prepare for the test by putting on the sensors that record the physiological reactions. A pattern of reactions is created using reference questions whose answers are known (e.g. name, age, address). The really important questions are then asked and the recording is interpreted and evaluated by the expert in order to exclude sources of error such as nervousness, fear and physical complaints as far as possible.

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