Have you ever been scrolling through the channels of your television and can't find anything good on to watch? Well when this happens to me I usually get caught up watching The Maury Show and watching couple after couple getting back the test results of polygraphs their partner took.
Most of the people that are found to be guilty on the show argue that it "wasn't possible" and that they were innocent. Many of them even ask to retake the test, but I always seemed to convey guilt to me as the viewer. I believed this until I came across a topic in our textbook that would change my perspective in an interesting way. The topic concerns the Modern Polygraph Test and Evaluating the Polygraph Test: What's the Truth?. Through these two sections of the book, in chapter 11, I learned that the commonly used lie detector test that is given in the United States isn't as reliable as I believed. Actually, it is even referred to as being "biased against the innocent" and "yields a high rate of false positives, being those who the test incorrectly deems as guilty."(Iacono & Patrick, 2006; National Research Council, 2003). The test measures a person's physiological signals like changes in blood pressure, a person's breathing and even a person's skin for sweat!