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Non-Obvious Relationships between Anthropometry and Cognitive Ability

Aldric Hama

Published: 2008/12/01


There is a significant positive correlation between intelligence and brain size, whether measured directly by neuroimaging or indirectly by cranial volume. Both intelligence and brain size are highly heritable, indicating the importance of genes. Aside from the cranium, other external anatomy could correlate with intelligence. Although some of these structures may appear to have no association with the brain (and intelligence), they in fact share a common developmental and genetic origin. It is possible that these non-obvious traits are differentially distributed across groups as well as individuals. Given the widespread effects of genes and hormones on phenotypic development, it is possible that there are a number of non-obvious human structures that correlate with brain structure and cognitive ability.

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