What is a likely explanation for the results from cross-sectional studies showing that older people are less likely to score as well as younger subjects on traditional intelligence tests?

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Quizplus · Accepted Answer

Cross-sectional studies compare individuals of different ages at the same point in time. Therefore, differences in performance may be due to cohort effects, such as differences in education or cultural factors that have affected each age group differently, rather than actual age-related declines in intelligence. This is supported by longitudinal studies that show stability in cognitive ability across the lifespan.

What Is a Likely Explanation for the Results from Cross-Sectional