title: The heritability of intelligence in Japan.
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.
authors: University of Ulster, Coleraine, County Londonderry, Northern Ireland.
authors: R
authors: R
authors: Lynn
authors: K
authors: K
authors: Hattori
mesh_terms: D001724:Birth Weight; D002648:Child; D005260:Female; D006801:Humans; D007360:Intelligence; D007564:Japan; D008297:Male; D010641:Phenotype; D014429:Twins, Dizygotic / Q000235:genetics*; D014430:Twins, Monozygotic / Q000235:genetics*