Intelligence And Aptitude — Psychology STD 12 Humanities — Question

Nature and Nurture Interplay
Role of nature
Study on identical twins
Correlation

1. Identical twins reared together (.90).
2. Reared apart (.72).
3. Fraternal twins reared together (.60).
4. Siblings reared together (.50).
5. Siblings reared apart (.25).

Studies of adopted children’s intelligence show more similarity to their biological parents
Role of nurture:

• As children grow, their intelligence levels move closer to their adaptive parents.
• Environment deprivation lowers level of intelligence while enriched environment increases level of intelligence.

Hence heredity sets the range within which an individual’s intelligence is shaped by support and opportunities of the environment.