Genetic and environmental influences on the development of piagetian logico-mathematical concepts and other specific cognitive abilities: a twin study.
D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D003210:Concept Formation; D005260:Female; D006801:Humans; D008128:Logic; D008297:Male; D008433:Mathematics; D011247:Pregnancy; D011581:Psychological Tests; D011594:Psychometrics; D012931:Social Environment; D012959:Socioeconomic Factors; D013850:Thinking; D014427:Twins / Q000523:psychology*; D014429:Twins, Dizygotic / Q000523:psychology*; D014430:Twins, Monozygotic / Q000523:psychology*