alleryThe IQ correlation for identical twins raised together is about?
A0.50
B0.90
C0.25
D0.60
Answer & Solution
Correct answer: B. 0.90
1. Twin studies give evidence of hereditary influence on intelligence.
2. The intelligence of identical twins reared together correlates almost 0.90.
3. Brothers and sisters reared together correlate about 0.50.
_Source: NCERT Class XII Psychology, Ch 1 Variations in Psychological Attributes (ncert.nic.in/textbook/pdf/lepy101.pdf), "Intelligence: Interplay of Nature and Nurture"_
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