Polygraphs tests, or commonly known as a "lie detector" test, are often seen used in movies, television shows, and in real life. This produces the misconception that this test is a foolproof method to see if someone is lying. This test rests on the assumption that bodily reactions supposedly give them away whenever they lie. The test measures physiological signals that often reflect anxiety like blood pressure, respiration, and skin conductance. While this test usually does better than chance for detecting lies, it also comes with a high rate of false positives. False positives potentially put innocent people in jail, which is unacceptable. I think this is something that must be changed as we can't put innocent people in jail because some test, that is only occasionally right, said that they were guilty. This makes me question why the polygraph test is still in use at all because of its inaccuracy. The book mentioned that they use it to get confessions out of victims who think they got caught because the polygraph said they were lying. However, the book also mentioned that when people do not confess but the polygraph came out that they lied, everyone assumes they are guilty. I think this is something that needs to be eliminated from our justice system because of its inaccuracy.