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At what age does the brain reach its peak? A look at cognitive function throughout life

According to research published in *Psychological Science*, different cognitive skills peak at wildly different ages, with some mental abilities like processing speed peaking around 18 or 19 while vocabulary skills peak much later, in the late 60s or 70s. The common belief that the brain reaches a single peak early in life and then declines is now considered too simplistic. When asking, **"At what age does the brain reach its peak?"** the answer depends on the specific cognitive ability in question.