According to the text, about what percent of the adult population either maintains a stable level of intellectual performance or increases their performance well into their 70s?
A) about 40-45%
B) about 60-70%
C) about 80-85%
D) nearly 100%

Question

Quizplus · Accepted Answer

The text notes that when we look at how individuals change as they grow older, we find that 45 to 60% of people maintain a stable level of overall intellectual performance-both fluid and crystallized-well into their 70s. An additional 10-15% show increases in performance into their mid-70s.

According to the Text, About What Percent of the Adult