Development of Piagetian logicomathematical concepts and other specific cognitive abilities.
D000367:Age Factors; D002648:Child; D002657:Child Development; D003071:Cognition; D005260:Female; D014644:Genetic Variation; D005824:Genetics, Behavioral; D006801:Humans; D008128:Logic; D008297:Male; D008433:Mathematics; D011247:Pregnancy; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic