Longer survival rates of the healthiest and most intelligent people partially account for the apparent stability of intelligence across the life span found in

Question

Quizplus · Accepted Answer

Longitudinal studies track the same group of individuals over time, allowing researchers to observe changes in intelligence within that group and control for factors such as mortality rates among different groups. The longer survival rates of healthier and more intelligent individuals can lead to more stable intelligence scores in longitudinal studies, thus partially accounting for the apparent stability of intelligence across the life span. Cross-sectional studies, on the other hand, compare different age groups at the same point in time and do not control for individual differences in mortality rates. The normal curve and standard deviations are statistical concepts related to the distribution of intelligence scores, but do not directly address the issue of stability across the life span.

Longer Survival Rates of the Healthiest and Most Intelligent People