The site even includes a three minute video clip from the Discovery Channel's MythBusters show interviewing an expert on lie detection.
Go to http://people.howstuffworks.com/lie-detector.htm
for more information.
A resource for any teacher of high school psychology, whether AP, IB or Introduction to Psychology
This Wired Science article "MRI Lie Detection to Get First Day in Court" describes the efforts of some researchers and lawyers in San Diego to admit fMRI results as an accurate method of lie detection. The article goes on to describe the possible difficulties with using fMRI scans in court. My favorite line: "So far as I can tell, there are many more reliable ways to corrupt data from an MRI machine than a classic polygraph machine." This article and other resources about lie detection might be a fascinating critical thinking exercise for psych. students (perhaps during the bio unit?)