Early cross-sectional research usually showed that crystallized intelligence reaches its peak during ; fluid intelligence reaches its peak during .
A) middle adulthood; adolescence
B) middle adulthood; middle adulthood
C) early adulthood; middle adulthood
D) adolescence; early adulthood

Question

Quizplus · Accepted Answer

Early cross-sectional research consistently showed that crystallized intelligence, which reflects knowledge acquired through education and experience, continues to increase throughout adulthood and may even peak in middle age. On the other hand, fluid intelligence, which involves problem-solving and abstract reasoning, tends to peak in adolescence or early adulthood and then declines gradually with age.

Early Cross-Sectional Research Usually Showed That Crystallized Intelligence Reaches Its