Brain Scanning | Spelling out whole words with your mind

Real-time, brain-scanning speller gives the silent a voice "Sorger?s team came up with a letter-encoding technique in which participants were asked to perform a particular mental task for a set period of time to signify a specific character. This produced 27 distinct brain patterns corresponding to each letter of the alphabet and a space character. [...]

Source: http://www.richardbanks.com/trends/2012/06/30/brain-scanning-spelling-out-whole-words-with-your-mind/

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