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Detecting Lies By Use Of A Polygraph Morally, it is wrong to lie to another person a view that is also supported by the biblical teaching and hence the regular conditioning in our minds is, to tell the truth. Therefore no human being would want to find themselves lying, but when one is subjected to pressure especially if they are on the downside they are probably going to lie. Mainly when one is lying they are anxious and nervous which in turn produce unique physiological effects which may be visible or may be detected using lie detecting machines. Due to its ability to read and detect the physiological changes that happen when one lies, a polygraph is the most used machine to detect lies. There characteristic physiological changes that are associated with lying include an increase in breathing rate. A the difference in rates of breaths which is characterized by a sharp increase in breath rates followed by shallow breaths is experienced. A polygraph quickly detects such changes since It has pneumographic aspect. When one is lying their blood pressure which represents blood circulation in the body also rises. The polygraph has a cardiographic aspect that quickly detects the change in blood pressure when one is lying. Another important sign that someone is lying is the increase in sweat discharge from their bodies. The the electrical resistance of the subject’s skin is measured and any changes noted by the polygraph. The method does not measure the amount of sweat that one produces directly, but it measures electrical conductivity which is bound to increase with the increase of perspiration amount. When the amount increases it ensures there is increase in electrolyte concentration since sweat is ionic liquid allowing electric current to pass through.
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All the results that are collected by the polygraph lie detector are recorded in the form of a graph. Initially recording of the information collected by a polygraph was done by tracing it on a chart paper. But in the modern technological era polygraphs are connected to laptops which saves all the information hence eliminating the tiresome work of analyzing the results using papers. It is also possible through a computer to carry out tests on multiple subjects where the computers store the results for later analysis or reference.
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A digital polygraph possess other numerous benefits. One of the benefits is that experts have developed a software that helps to ease the process of analyzing data and information. The the software is also designed to convert the information into the required format for analysis by the examiner. It is advisable that one does not rely on the polygraph as the only test to determine whether the subject is lying.