Regardless of the research methodology being used, researchers studying changes in intelligence over the lifespan usually find that
A)both fluid and crystallized intelligence show similar declines in middle adulthood
B)both fluid and crystallized intelligence show similar declines in late adulthood
C)crystallized intelligence appears to decline somewhat earlier than fluid intelligence does
D)fluid intelligence appears to decline somewhat earlier than crystallized intelligence does

Question

Quizplus · Accepted Answer

Fluid intelligence, which involves the ability to think and reason abstractly and solve problems, tends to decline earlier in life, often starting in adulthood. In contrast, crystallized intelligence, which involves knowledge that comes from prior learning and past experiences, tends to remain stable or even increase with age until much later in life.

Regardless of the Research Methodology Being Used, Researchers Studying Changes