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.
Correct Answer:

Verified
Correct Answer:
Verified
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