If 40-year-olds and 60-year-olds show differences in intelligence test scores, the differences in the test scores
A) must be due to age effects.
B) may be due to either age effects or cohort effects.
C) must be due to cohort effects.
D) are due to neither age effects nor cohort effects.

Question

Quizplus · Accepted Answer

The differences in test scores between 40-year-olds and 60-year-olds may be due to either age effects (e.g. cognitive decline with age) or cohort effects (e.g. differences in educational opportunities or life experiences). It is difficult to determine the exact cause without further investigation. The other options are not correct because the differences in test scores cannot be solely attributed to age or cohort effects.

If 40-Year-Olds and 60-Year-Olds Show Differences in Intelligence Test Scores