It is unfair and scientifically invalid to compare IQ scores of a cross section to learn about age-related changes.

Question

Quizplus · Accepted Answer

It is unfair and scientifically invalid to compare IQ scores of a cross-section because IQ scores are influenced by many factors besides age. Some factors that may affect IQ scores include education, socioeconomic status, and cultural background. Additionally, there is often a wide range of individual differences in cognitive abilities within age groups, making direct comparisons of IQ scores misleading. To accurately study age-related changes in IQ, longitudinal studies that follow the same individuals over time are needed.

It Is Unfair and Scientifically Invalid to Compare IQ Scores