A lie detector test is something that almost everyone is familiar with. A lie detector test is very commonly used in police investigations. A lie detector test is sometimes even used on a person who is applying for a job. Specific government jobs like the FBI or CIA make its candidates underdo a lie detector test before selecting anyone. When a person is undergoing a lie detector test, the examiner conducting the test asks specific questions. And accordingly, the examiner will determine if the person being tested is answering truthfully or lying.

When a lie detector test is being conducted on a person, there are around four to six sensors that are attached to the person being tested. In a lie detector test, the sensors that are attached to the body of the person send multiple signals which are recorded on a paper. The paper in which the multiple signals are being recorded is a single strip of paper that is continuously moving. It can also be called as graph paper. There are several signals that a sensor attached to the person in different areas record.

The sensors attached to the person while conducting the lie detector test prices usually record the rate at which the person is breathing. The sensors also register the pulse and blood pressure of the person on whom it is being conducted. The person’s perspiration is also recorded, and sometimes in specific lie detector tests, the movement of the person’s arms and legs is also recorded. When a lie detector test is being conducted, the norms of the person’s signal are first recognized, where the questioner asks a few straightforward questions first. The signals send by the sensors are recorded through the entire process of questioning on the moving paper.

While conducting a lie detector test, the examiner can anytime look at the multiple signals that are being recorded on the moving paper. This is done to check whether there are any significant changes in the person’s vital signs while answering a particular question. If there are substantial changes noticed on the graph by the examiner, then the person has lied, such as an increase in the heart rate, perspiration, and all. The examiner can determine by observing the graph if the person has lied or told the truth while answering the question.

However, the absolute most important matter to remember while conducting a lie detector test is to select the issues really attentively. Putting the wrong type of concerns may mislead the man or woman who’s undergoing the lie detector test. In the event the examiner asks the incorrect sort of queries concerning the person, then then there is the chance of the system depicting the clear answer replied by the person as lying. Thus, in such situations, even if the person answers frankly, the man has been shown to be more lying from the lie detector apparatus.


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