Multiple Choice
Your text reports that the correlation between identical twins' scores on aggression measures is about .43; the correlation between fraternal twins' scores on aggression measures is around .14. Most immediately, these coefficients indicate:
A) a sizeable genetic contribution to aggression
B) a minor genetic contribution to aggression
C) a minimal role for shared environmental factors in aggression
D) both A and C
Correct Answer:

Verified
Correct Answer:
Verified
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