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Things About Lie Detectors You Should Know Of. The easiest way to determine the character of those employed in an organization and those who are yet to be employed is through the lie detector test. Many people see the lie detector test as a very controversial instrument. Some believe that the lie detector test works and is the easiest way of knowing if someone is lying or not. Most professionals in science prefer the term polygraph than lie detector test. Polygraphs work in such a way that it is quite easier to figure out whether someone’s saying the truth through measuring different levels of the body. The person judging simply checks out the reaction as the person is answering the question to determine if the subject is engaging in deception. Once an analog machine, the scribble lines on the graph has changed and now become a digital machine.
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Its Functions.
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The polygraph detector easily detects the respiratory rate, heart rate, and amount of perspiration through the finger-tips of the person at hand. Then the examiner will start to check out the results of the test and study any differences in the results of the behavior. The subject at hand has wires and tubes closely going through from the machine to the subject in question. The professional examiner is able to assess the version of the story of the subject at hand. Nevertheless, in this process, the lie detector is not in use. The subject is able to be recorded and observed by the examiner. The next stage involves setting questions by the examiner for the subject. Luckily, the lie detector is able to test about 60-70% on questions that require yes and no answer. Honestly, the test is an exact science as described by many who purchased. Many people suggest that the people who conduct the interview should take into account their subjects cultural background, religious beliefs etc. Contention. Frankly, most people argue that the lie detector has both false positive and negatives. For example, a false positive is where someone tells the truth, but it reads as a lie and a false negative is where someone lies but it tells it as the truth. People say that there’s a way to beat the machine by doing something like biting their lip each time a query is asked. Another challenge noticed by many is that the polygraph is inconsistent. There are states that allow anyone to become an examiner while others deny till one has undergone training and been certified.