What has become a virtual consensus among researchers studying the effect of aging on intelligence?
A) intelligence as a whole declines considerably with advancing age
B) intelligence plateaus at age 25 then remains virtually unchanged until the 80s
C) fluid intelligence remains nearly flat, but crystallized intelligence declines sharply in the 60s, 70s, and 80s
D) crystallized intelligence remains nearly flat, but fluid intelligence declines sharply in the 60s, 70s, and 80s

Question

Quizplus · Accepted Answer

Research indicates that crystallized intelligence, which relies on accumulated knowledge and experience, tends to remain stable or even increase with age, while fluid intelligence, which involves the ability to think logically and solve problems in novel situations, independent of acquired knowledge, tends to decline.

What Has Become a Virtual Consensus Among Researchers Studying the Effect