alleryBrothers and sisters raised in separate homes show an IQ correlation of?
A0.50
B0.72
C0.90
D0.25
Answer & Solution
Correct answer: D. 0.25
1. The text lists correlations from closest to weakest kinship and shared home.
2. Identical twins reared apart reach 0.72 and siblings together about 0.50.
3. Siblings reared apart correlate only about 0.25.
_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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