The heritability of intelligence in Japan |
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| Authors: | Richard Lynn Ken Hattori |
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| Affiliation: | (1) University of Ulster, BT 52 1SA Coleraine, County Londonderry, Northern Ireland;(2) National Rehabilitation Center for the Disabled, 359 Tokorozawa, Japan |
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| Abstract: | Japanese data for 543 monozygotic (MZ) twins and 134 dizygotic (DZ) twins tested for intelligence at the age of 12 give correlation coefficients of. 782 and .491, respectively, indicating a heritability of .582. Heavier twins at birth have significantly higher IQs at the age of 12, suggesting that prenatal nutrition exerts a significant effect on intelligence. |
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| Keywords: | intelligence twins heritability Japan prenatal nutrition birth weight |
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