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Cognitive Stability in Early and Middle Adulthood

In contrast to physical abilities, which peak in the mid-20s, cognitive functions generally remain stable throughout early and middle adulthood. Specifically, crystallized intelligence tends to hold steady or even improve. This stability is reflected in intelligence test scores, which show little to no decline for adults until they reach their mid-30s to mid-50s.

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Updated 2026-05-03

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