Lying and lie detection is depicted surprisingly often in our media today. Shows such as Lie To Me, CSI, and even Dr. Phil expose to public to, and use, different methods to distinguishing the truth from lies. Because of this exposure, I thought I knew the basics to lie detection, but after reading more in depth about it, I now realize that I was wrong. It was surprised to find out that there is "little to no correlation between people's confidence in their ability to detect lies and their accuracy", or in other words confidence doesn't relate to correctness. In addition, lies tend to have fewer details and qualifiers in comparison to true statements. As we all know, there are many ways to test whether someone is telling the truth or not. One of the most common, or well known, ways is the polygraph test. This test essentially measures the bodily reactions to lying. For example, one's heart rate, blood pressure, or perspiration. At first glance this seems like a great measure, but it's been found that the polygraph test is actually biased against the innocent, for these bodily functions can also be present in nervousness, arousal, or anxiousness, and not solely in lying. I found this fact extremely surprising because on television, for example, the polygraph is shown in a light that makes it seem as though it is extremely reliable, when in reality it shows almost 40% of innocent people as guilty. I found this section of the chapter very interesting for this reason exactly.
TrackBack URL: http://blog.lib.umn.edu/cgi-bin/mt-tb.cgi/185234