Which statement best contrasts fluid and crystallized intelligence and their typical aging patterns?

Which statement best contrasts fluid and crystallized intelligence and their typical aging patterns?

• A. Fluid intelligence is knowledge accumulated through schooling; crystallized is processing speed.
• B. Fluid intelligence declines with age; crystallized remains stable or increases.
• C. Fluid intelligence remains stable; crystallized declines with age.
• D. Crystallized intelligence is about processing speed and problem-solving efficiency.

Answer: (B)

Fluid intelligence is the ability to reason through new problems, think quickly, and solve unfamiliar tasks, relying on mental flexibility and processing speed. Crystallized intelligence, in contrast, draws on knowledge and skills accumulated over time, like vocabulary and general world knowledge. As people age, processing speed and the ability to handle novel problems tend to decline, so fluid intelligence typically decreases. Crystallized intelligence, built from years of learning and experience, usually remains stable and can even improve with age. That’s why the statement that fluid intelligence declines with age while crystallized intelligence remains stable or increases best captures the typical aging pattern.

Fluid intelligence is the ability to reason through new problems, think quickly, and solve unfamiliar tasks, relying on mental flexibility and processing speed. Crystallized intelligence, in contrast, draws on knowledge and skills accumulated over time, like vocabulary and general world knowledge. As people age, processing speed and the ability to handle novel problems tend to decline, so fluid intelligence typically decreases. Crystallized intelligence, built from years of learning and experience, usually remains stable and can even improve with age. That’s why the statement that fluid intelligence declines with age while crystallized intelligence remains stable or increases best captures the typical aging pattern.