Functional magnetic resonance imaging (fMRI) is making its way into the public consciousness. The film Salt has an interrogation scene where a spy spills some secrets while a scientist looks at his brain scan. After a quick glance, the scientist casually says with absolute certainty, "He's telling the truth."
As with any new technology, there's a lot of potential for good, but there's also a lot of potential for pseudoscience and bad science. Remember those kooky Canadians who've used "fruit machines" and peter meters to catch people lying about being gay and what-not? Now they are moving north of the groin and firing up fMRIs. They're already making questionable claims and writing grant proposals based on what parts of the brain "light up" when people view certain stimuli. Lies, thoughtcrimes, and precrime (offense prevention) are all on the list of things they claim fMRI will divulge if taxpayers will just fund their research.
It's the same concept behind privately-held ventures like No Lie MRI in San Diego, which, for a cool $5,000, will administer a "truth-verification" session. Though this Orwellian evidence has so far been successfully deemed inadmissible in US courts under the Daubert Standard, people are still trying to use it. Reporter Mark Harris got tested to see if he is a liar and presented his troubling experiences in the most recent IEEE Spectrum.
MRI Lie Detectors [IEEE Spectrum]
