title: Social reinforcement of a manipulative response in six- and nine-month-old infants.
mesh_terms: D000367:Age Factors; D002652:Child Behavior; D002657:Child Development; D003216:Conditioning, Operant; D005108:Extinction, Psychological; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012055:Reinforcement Schedule; D012056:Reinforcement, Social