Infant social attachments: a reinforcement theory interpretation and investigation.
D001010:Anxiety, Separation; D002657:Child Development; D003213:Conditioning, Psychological; D005149:Facial Expression; D005260:Female; D006801:Humans; D007223:Infant; D007398:Interpersonal Relations; D008297:Male; D009034:Mother-Child Relations; D012054:Reinforcement, Psychology