Researchers came to realize, over time, that the two hemispheres have somewhat different personalities and skills—this includes their abilities to think abstractly, create stories, draw inferences, determine the source of a memory, and make good choices in a gambling game. Roger Sperry, one of the neurobiologists who pioneered the split-brain studies (and garnered a Nobel Prize for it), came to understand the brain as “two separate realms of conscious awareness; two sensing, perceiving, thinking and remembering systems.” The two halves constitute a team of rivals: agents with the same goals
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