People who are genetically unrelated but are raised in the same home have IQ scores that are more similar than that of genetically unrelated people raised in different homes.

Question

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This is known as the "nature vs nurture" debate in psychology. Research has shown that genetics play a role in determining intelligence, but environment and upbringing also have an impact. Studies have found that when comparing individuals who are genetically unrelated but raised in the same home, their IQ scores are more similar than those of genetically unrelated individuals raised in different homes, suggesting that environmental factors do play a significant role in shaping intelligence.

People Who Are Genetically Unrelated but Are Raised in the Same