Things About Lie Detectors You Should Know Of. The lie detector test is the simplest way of getting evidences in court cases, as well as determining the character of current and potential employees. Many people see the lie detector test as a very controversial instrument. Besides, there are those convinced that the lie detector test is the best way to go as it makes it easier for someone to know if the subject at hand is telling the truth or not. Professionals involved in the science do not like to use the term and prefer the word polygraph. The polygraph works in a way that it measures the levels of the body with aim of trying to figure out if someone’s telling the truth or not. 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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The polygraph detector is able to check out the respiratory rate, heart rate, and the amount of perspiration through the finger-tips of the person being questioned. Afterward, the examiner starts to go through the results of the test and study any differences in the results of the behavior. The detector machine’s wires and tubes are closely places on 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 examiner uses this observation to record and monitor how the subject responds. 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. Frankly, the test follows suit in the case of an exact science and is much appreciated by many who are well trained in the process. However, many argue that the subject’s cultural background, religious beliefs should be taken into account and thus only questions that will elicit biological responses to be asked. Contention. Frankly, most people argue that the lie detector has both false positive and negatives. Well, a false positive is where the lie detector shows that someone has lied while in fact it is the truth while the false positive is where the detector shows that someone has said the truth but it’s a lie. Some say that there’s a hack where someone can bit their lip each time a question is posed. 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.