Research of Rhee and Wildman has shown that approximately what percentage of individual differences in levels of aggression can be accounted for by shared environmental influences?

Question

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Rhee and Wildman's research has shown that only about 16% of individual differences in levels of aggression can be accounted for by shared environmental influences. This means that the majority of the variance in aggression is due to genetic factors and non-shared environmental influences.

Research of Rhee and Wildman Has Shown That Approximately What