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Twin study

Heritability Explanation

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Heritability appears in many texts in school. Heritability statistics rose from the work of Galton. It is a group statistic that makes no sense to apply to an individual. Heritability is the extent to which differences in the appearance of a trait across several people can be accounted for by differences in their genes. Heritability does not reflect the extent to which traits will be passed down from parent to offspring. The estimates usually come from twin studies. If IQ is very heritable, it means that individuals with the same genes have similar IQs and individuals with different genes have relatively different IQs. Problems arise when what IQ doesn?t mean is considered.
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