Another study is about to come out on the use of fMRI in lie detection, reporting 90% accuracy in detecting deception. The study was led by Mark George at the Medical University of South Carolina. Here's an excerpt from a news article on the study which will appear in Biological Psychiatry this week:
Researchers at MUSC conducted the study using 60 healthy men. They offered some extra money if they could manage to trick the machine but none could.
"We had some of our study group try to dupe us, and they were unable," George said.
The MRI images show that more blood flows to parts of the brain associated with anxiety and impulse control when people lie. More blood also flows to the part of the brain handling multitasking because it is hard for people to keep track of lies they have told.
In the study, researchers had participants commit a mock theft. Then questions about the theft were projected onto a screen while they were inside the MRI machine. Participants pressed a button to respond to the yes or no questions.
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