Mother-infant play at six months as a predictor of attachment security at thirteen months.
D001007:Anxiety / Q000523:psychology; D003142:Communication; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008297:Male; D009034:Mother-Child Relations; D009769:Object Attachment; D010988:Play and Playthings