the testing phase, which addresses the interview questions, as well as a set of independent questions, the answer to which is predetermined and which can provide a benchmark of emotional stability.the pre-test phase, where the legal reasons for the procedure are exposed, the type of questions that will be asked, and the legal consent of the interviewee is obtained then calibrate the device by interacting with the test person, in fact, creating and maintaining a psychological contact between the polygraphist and the test person.The test lasts an average of three hours, and the examiners have to go through, together with those tested, three stages:

In fact, the procedure is a set of closed-ended questions – “YES” or “NO” – to the interviewee, which is connected to a polygraph machine. Moreover, a report from 1983, coordinated by psychologist Leonard Saxe at the request of the American Congress, which led to a national ban on polygraph testing in the private workplace, concludes that there is too little scientific evidence to provide an empirical validity of the procedure. Thus, you can fail a lie detector test if you are nervous, calm or even if you didn’t know you were taking a lie detector. Can you fail a lie detector test if you are nervous?Įven if the practice of lying detector testing fascinates everyone, after almost a century of scientific research, the veracity of the results of polygraph tests cannot be confirmed. We debate whether you can fail a lie detector test if you are nervous, and give you some tips to prepare for a polygraph test. In this blog post, we talk about lie detectors, also known as polygraphs.

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