Our curiosity might have brought us to the point that to catch a person who is lying or who is telling the truth, we should use lie detector test. Many experts in the world of criminal justice and law enforcement believes that to catch a person who is being dishonest and being deceptive, they will look them straight into the suspect’s eyes and see if they are anxious, uneasy or uncomfortable during the lie detector test questioning.
Lie detector test is also known as a polygraph test. A polygraph machine is used during interrogation between the law enforcer and the person of interest who is required to undergo questioning for the case he or she is involved in. They could either be a witness or the accused themselves. The polygraph machine has straps that is wrapped around the body’s pulse areas such as the chest, arms and wrists to detect any unnecessary increase of heart rate, increase in blood pressure, sudden perspiration and other manifestations that police can tell that the person is lying to them and how the person reacts to the impact of the question thrown at them during the questioning and tell if they are telling the truth or just being deceptive.
A lot of people might certainly know how a lie-detector test function. It has become one of the most used props in a movie film or a television show because of its ability to tell if that person is lying or not. However, that is just seems to be a front of a more intriguing process of absorbing truthful information and determining deception using lie detector test.
In this article, let me teach you how lie detector test uk works, how it detects lies and how it is still used by many law enforcers as part of their investigation methods.
So how does a lie detector test or a polygraph machine works? It has different phases. The first one is through a pre-lie detector test interview between the technician of the polygraph machine and the person who is going to be in the hot seat. The technician who also serves as the examiner interviews the client in which they can disclose or reveal things and information that might be incriminating them, or they can tell the examiner some culpability in which the latter can form several and critical questions that the examiner will ask during the test.
After the interview, the examiner will start providing some controlled questions to the suspect to determine their base level of response through physiognomic way that it signifies the sudden perspiration, faster heart rate, stronger pulse and increased blood pressure indicating that the person in the hot seat is having difficulties answering the question.
Polygraphs do not detect lies just like peeking through a crystal ball. In some countries it is not used to detect lies but rather one way to determine what kind of approach the assigned law enforcers to the case they are handling since it not usually admissible in the court of law.
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