A well-known investigation which found that identical twins, whether raised together or apart, exhibit a higher correlation between their IQ scores than siblings or fraternal twins raised together. This revealed a genetic component to intelligence.

Minnesota Study of Twins Reared Apart

Investigations used to determine the heritability of intelligence. By comparing the IQ score correlations of different sibling pairs, such as identical twins raised together versus apart, researchers can identify genetic components.

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The degree to which intelligence is inherited from a person's parents. Scientists typically use twin studies to determine this heritability, revealing a genetic component to intelligence.

Heritability of Intelligence

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

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