Psychologists increase understanding of how the brain perceives shades of gray

Peoples' eyes, nerves and brains translate light into electrochemical signals and then into an experience of the world around them. A close look shows that even seemingly simple tasks, like keeping a stable perception of an object's color in different lighting conditions or distinguishing black and white objects, is, in fact, very challenging. By way of a novel experiment, psychologists have now provided new insight into how the brain tackles this problem.

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