A reasonable explanation for why 40-year-olds and 60-year-olds show differences in intelligence test scores is due to:

Question

Quizplus · Accepted Answer

The differences in intelligence test scores between 40-year-olds and 60-year-olds are likely due to cohort effects, meaning that the two age groups grew up under different cultural and educational environments that could impact their performance on IQ tests. This is a more likely explanation compared to secular trends (which refer to global changes in intelligence over time) or declining IQ with age (which is not necessarily supported by research). While biases in IQ testing are possible, they are less likely to account for systematic differences between two large age groups.

A Reasonable Explanation for Why 40-Year-Olds and 60-Year-Olds Show Differences