Crystallized intelligence and fluid intelligence are terms for the same underlying construct,which is known as practical intelligence.

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Crystallized intelligence and fluid intelligence are different from practical intelligence, which refers to the ability to adapt to everyday life situations and problem-solving in real-life contexts. Crystallized intelligence refers to acquired knowledge and skills, while fluid intelligence refers to mental processes such as reasoning, abstract thinking, and problem-solving.

Crystallized Intelligence and Fluid Intelligence Are Terms for the Same