Trends in both crystallized and fluid mental abilities reported from the Seattle Longitudinal Study indicate that middle-aged adults __________.
A) show steady increases in nonverbal IQ
B) often overestimate their intellectual abilities
C) are intellectually "in their prime," not "over the hill"
D) show sharp decrements in ability, starting around age 40

Question

Quizplus · Accepted Answer

The Seattle Longitudinal Study indicates that middle-aged adults are intellectually "in their prime," not "over the hill." In other words, both crystallized and fluid mental abilities remain stable or continue to improve during middle age. Option A is incorrect as there are no reported steady increases in nonverbal IQ. Option B is incorrect as there is no information given on the tendency of middle-aged adults to overestimate their intellectual abilities. Option D is incorrect as the trend reported in the study is not sharp decrements in ability, starting around age 40.

Trends in Both Crystallized and Fluid Mental Abilities Reported from the Seattle