"Researchers at Canada's largest children's rehabilitation hospital have developed a technique that uses infrared light brain imaging to decode preference – with the goal of ultimately opening the world of choice to children who can't speak or move.
In a study published this month in The Journal of Neural Engineering, Bloorview scientists demonstrate the ability to decode a person's preference for one of two drinks with 80 per cent accuracy by measuring the intensity of near-infrared light absorbed in brain tissue."- http://www.eurekalert.org/pub_releases/2009-02/uot-csr020909.php
Read full study
Thanks Engadget
(image stolen from this dude)
