Which of the following best explains why early cross-sectional research found that intelligence declines with age?
A) Cross-sectional studies compare groups of people over an extended length of time.
B) Early cross-sectional studies were limited because a large number of participants withdrew from the studies.
C) Cross-sectional studies compare groups of people who are the same age.
D) Early cross-sectional studies compared people of different eras who had varying levels of education and different family experiences.

Question

Quizplus · Accepted Answer

Cross-sectional studies compare individuals of different ages at one point in time, which can introduce cohort effects where differences in intelligence are not just due to age but also to the varying experiences and environmental factors, such as education and family background, of different generations.

Which of the Following Best Explains Why Early Cross-Sectional Research