IQ's of identical twins reared apart.
D000124:Achievement; D000367:Age Factors; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003431:Cross-Cultural Comparison; D004777:Environment; D005260:Female; D005824:Genetics, Behavioral; D005828:Genetics, Population; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007360:Intelligence; D007361:Intelligence Tests; D010641:Phenotype; D011247:Pregnancy; D012923:Social Class; D013223:Statistics as Topic; D014427:Twins