Lying or Not?

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We all know what a polygraph test is but do we know how accurate they are? We know from our psychology book that the tests measure the changes in skin conductance and even respiration. According to, it is fairly close to 100 percent correct. The article suggests that it depends on the experience of the examiner. If you have an inexperienced examiner, they might not be able to read the results correctly after each question. However, if an experienced examiner reads the results, they have the practice and knowledge in knowing what to look for. The article brings up an example of an examiner asking ten questions. The examiner identified seven correct decisions, wrong in one, and two were inconclusive. Since there were eight definitive answers and two inconclusive, the article figured the accuracy to be 87.5%. That is pretty accurate. Common errors in a inexperienced examiner are things such as misinterpretation of the data, weak training of the individual, badly worded questions, and improper use of testing techniques. In my opinion I do not the polygraph test should be used in order to predict the accuracy of lies or truths. In critical situations, like court, there is such uncertainty with the test that it should not be reliable. Someone may be convicted that should not be because of an unreliable test.

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This page contains a single entry by nogax001 published on November 20, 2011 5:56 PM.

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