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

Question 116

Multiple Choice

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.

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