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Components of a Lie Detector You Have to Know. 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. Sadly, most people do not consider the lie detector test as the best form of getting evidences and determining character. 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. 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 is able to look at the reaction of body when the person is answering questions and thus able to determine if the subject is engaging in truthfulness. The machine, once an analog machine, has now changed over the years to be a digital one.
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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. Afterward, the examiner starts to go through the results of the test and study any differences in the results of the behavior. The subject in question is hooked up with many wires and tubes to the lie detector machine. Knowing the version of the story of the subject becomes easier in such cases. In this stage of the process, the lie detector is not used. The subject is able to be recorded and observed by the examiner. The next stage involves setting questions by the examiner for the subject. In fact, the lie detector is able to test about 60-70% on questions that will allow the user to answer yes or no. 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. Regardless of this, most people argue that subject’s cultural background, religious beliefs should be taken into account and thus only ask target questions. Contention. Many argue against the lie detector stating that there are both false positives and negatives with the test. A good example of a false positive is where someone tells the truth but the detector detects it as a lie while a false negative is where someone tells a lie but the detector detects 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 problem noticed by many is the inconsistency levels in polygraphs. Certainly, there are two kinds of states; those who allow anyone to become an examiner while others deny it till one has gone through some formal training.