Brain Imaging Lie Detector Can Be Beaten

People have certain physical "tells" when they conceal information—and studies show that good liars can prevent these "tells" being detected by displaying physical red herrings of their own.

But scientists have now shown that even a brain imaging technique called fMRI, which in theory is much harder to trick, can be beaten by people who use two particular mental countermeasures...

This research is the first to explore the effects of mental countermeasures on brain activity in functional magnetic resonance imaging (fMRI)—and it showed that when people used the countermeasures, the test proved to be 20 percent less accurate. more