Genetic factors in temperamental individuality: a longitudinal study of same-sexed twins from two months to six years of age.
D000367:Age Factors; D001288:Attention; D002648:Child; D005260:Female; D005824:Genetics, Behavioral; D006801:Humans; D007223:Infant; D008137:Longitudinal Studies; D009043:Motor Activity; D010551:Personality; D011247:Pregnancy; D013694:Temperament; D014427:Twins / Q000523:psychology*