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 period 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

Early cross-sectional studies often compared individuals of different ages at a single point in time, without accounting for generational differences in education and life experiences. These differences can significantly impact intelligence measures, leading to the mistaken conclusion that intelligence declines with age.

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