In earlier cross-sectional studies of age-related changes in intelligence, the typical finding was that crystallized intelligence _________ and fluid intelligence _________ during middle adulthood.
A) remained the same or increased; remained the same or increased
B) declined; declined
C) remained the same or increased; declined
D) declined; remained the same or increased

Question

Quizplus · Accepted Answer

Crystallized intelligence typically remains the same or increases during middle adulthood due to the accumulation of knowledge and experience, while fluid intelligence tends to decline during this time due to declines in processing speed and problem-solving abilities.

In Earlier Cross-Sectional Studies of Age-Related Changes in Intelligence, the Typical