How Does a Polygraph Work - Search Videos

How a polygraph works

How a polygraph works

The examination is administered by a trained investigator and can take up to two or three hours, possibly more depending on the scenario. It is comprised of three parts: Part 1: The Pre-Test The pre-test is a conversational interview during which the examiner makes a judgement as to whether the person is capable of being polygraphed. The ...

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