Suppose that it is customary in Boogravia for parents of identical twins to treat them exactly alike: same diet, same clothes, same school, same parental attention, etc. On a measure of self-awareness, the correlation for identical twins reared together is strong: r = +0.99. The measure of nonshared environmental influences (NSE) will be

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The strong correlation (r = +0.99) between identical twins reared together suggests that the shared environment has a significant impact on self-awareness. This leaves little room for nonshared environmental influences (NSE), which are factors that make twins different despite being raised in the same environment. Therefore, the NSE value will be very low (NSE = +0.01).

Suppose That It Is Customary in Boogravia for Parents of Identical