Longitudinal studies show that the decline in crystallized intelligence begins in early adulthood and continues steadily across the lifespan.

Question

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Longitudinal studies generally show that crystallized intelligence, which involves skills and knowledge accumulated over time, tends to remain stable or even increase with age, while fluid intelligence, which involves the ability to think and reason abstractly and solve problems, is more likely to decline in early adulthood.

Longitudinal Studies Show That the Decline in Crystallized Intelligence Begins