Genetic and Environmental Influences on Intelligence

Hard Unit 11: Testing & Individual Differences Genetic And Environmental Influences

Research has shown that both genetic and environmental factors play a significant role in shaping an individual's intelligence. One study involving twins examined the IQ scores of monozygotic (identical) twins raised together compared to those raised apart. Additionally, this study explored how environmental enhancements, such as enriched learning experiences, can impact cognitive ability. Considering these findings, which of the following statements best summarizes the interplay between genetic and environmental influences on intelligence?

Genetic influences are solely responsible for determining intelligence, and environmental factors have no significant impact.

Monozygotic twins raised apart will have identical IQ scores due to genetic similarity, regardless of environmental differences.

Both genetic and environmental factors contribute to intelligence, with environmental factors being more significant in individuals with lower genetic predispositions.

Environmental influences are the primary determinants of intelligence and can completely override genetic influences.

Intelligence is solely determined by socio-economic status, which eliminates the influence of genetics.

Hint

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