Twenty-five-year old Lay Hoon took a battery of intelligence tests for admission into the Royal Hong Kong Air Force Academy and scored slightly above average. She was tested again twenty years later, and her performance on the tests nearly doubled. According to the text, Horn and his colleagues would attribute this increase to
A) an increase in fluid intelligence.
B) an increase in crystallized intelligence.
C) an increase in both fluid and crystallized intelligence.
D) an increase in concentration and reaction time.

Question

Quizplus · Accepted Answer

Horn and his colleagues would attribute the increase in test performance primarily to an increase in crystallized intelligence, which tends to grow with age and experience, reflecting accumulated knowledge and skills. Fluid intelligence, on the other hand, typically peaks in early adulthood and then gradually declines.

Twenty-Five-Year Old Lay Hoon Took a Battery of Intelligence Tests