Individual differences in infant sociability: their origins and implications for cognitive development.
D002652:Child Behavior; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D005260:Female; D006801:Humans; D007206:Individuality; D007223:Infant; D007360:Intelligence; D008137:Longitudinal Studies; D008425:Maternal Behavior; D009769:Object Attachment; D010556:Personality Tests; D011247:Pregnancy; D002666:Psychology, Child; D012737:Sex Factors; D012919:Social Behavior; D014427:Twins