Lie Detectors Essay

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Lie detectors, or what the call Polygraphs do not work. There is countless generalization why polygraphs do not work. Lie detectors are what police use on suspected criminals, to see if the suspected criminal is guilty of the crime committed. Polygraph examiners ask yes and no questions to a suspected criminal about the crime that was committed. Then, polygraph examiners determine if the criminal is lying. Lie detectors have been used since the 1900’s. (Sterbenz, 2015) Citizens have complained about lie detectors but still, police carelessly use lie detector tests today. When taking a Polygraph test, polygraph examiners test to see if a suspected criminal is lying. (Baran, 2016) To see if the suspected criminal is lying, polygraph examiners …show more content…

(Baran, 2016) Polygraphs don’t actually measure lies, they measure the differences between how truthful suspected criminals react to relevant questions. (Sterbenz, 2015) Polygraphs are only considered from scientific and legal committees. (Baran, 2016) The Polygraph test is not trulley accurate, and suspected criminals can cheat on the test. To get a lie detector off course, suspected criminals will do indiscriminate things. For example, When a polygraph tester asks a question such as, “have you ever lied in your life?” The suspected criminal will answer truthfully. But to get the polygraph tester off course, the suspected criminal will thrust their foot down on a thumbtack. (Wolchover, 2011) When a suspected criminal assaults their foot down on a thumbtack, this motives the suspected criminal to sweat, and causes the suspected criminal’s blood pressure to accelerate. (Wolchover, 2011) The suspected criminals sweat and change in blood pressure will cause the needles to rise. (Wolchover, 2011) Now, a questions graph the suspected criminal told the truth about; looks the same as a questions graph they lied about. (Wolchover, 2011) To pass a polygraph test suspected criminals make sure they stay calm, maintain their breathing, answer questions without hesitation, make sure they do not think about the topic too much, and answer with yes or no, making sure they don’t do much explaining. (Wolchover,

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