If we were to make a statement about changes in intelligence over the life-span based on the results of cross-sectional studies, we would most likely say that
A) intelligence tends to increase over the life-span.
B) intelligence tends to decrease dramatically after the age of 50.
C) intelligence stays about the same over the life-span.
D) females tend to show fewer changes in intelligence over the life-span than do men.
E) intelligence tends to decrease dramatically after the age of 70.

Question

Quizplus · Accepted Answer

Cross-sectional studies often suggest that intelligence tends to decrease after middle age, with a more noticeable decline observed after the age of 50. This is because these studies compare different age groups at one point in time, which can reflect generational differences in education and other factors, rather than actual declines in intelligence due to aging.

If We Were to Make a Statement About Changes in Intelligence