alleryEvidence for hereditary influence on intelligence comes mainly from:
Astudies of school toppers
Bsurveys of teachers
Cstudies of brain size
Dtwins and adopted children
Answer & Solution
Correct answer: D. twins and adopted children
1. Psychologists want to separate the effects of heredity from environment.
2. The evidence for hereditary influence comes mainly from studies on twins and adopted children.
3. Twins share genes, and adopted children share a home with non-relatives, so each design isolates one factor.
_Source: NCERT Class XII Psychology, Ch 1 Variations in Psychological Attributes, "Intelligence: Interplay of Nature and Nurture", p. 9_
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