How Expectations Speed Up Perception

The human brain works incredibly fast but visual impressions are so complex that their processing takes up to several hundred milliseconds before they enter our consciousness.  Researchers say they know why this delay may vary in length; if you already know what you are about to see, you recognize it faster. When the brain possesses some prior information, such as when it already knows what it is about to see, conscious recognition occurs faster.    There has been some debate about whether or not the processes leading up to conscious perception were more rigid and if their timing varied. read more

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