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Neurology Brains Learn Like Robot British scientists have found that robots and humans think in much the same ways when making value judgments, Nature Science Update reported. University College London researchers used magnetic resonance imaging on 14 subjects while they learned to distinguish a bad hunch from a good omen. The researchers showed subjects arbitrary images, punished certain combinations with a painful electrical shock to the back of the hand and rewarded others with a less-painful one. After a few trials, key brain regions lit up as subjects began picking up on which arrangements meant trouble. Two areas illuminated in the scans were the insular cortex, which processes emotions, and the ventral striatum, known as the brain's motivation center -- both of which had not been associated before with distinguishing good stimuli from bad. The team plotted brain activity on a graph for a mathematical description of the value judgment processes and saw the patterns matched almost perfectly those made by robots learning from experience. Copyright 2004 by United Press International. All rights reserved. - Updated: July 2, 2004 |
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