title: Model affect and children's imitative altruism.
mesh_terms: D000339:Affect; D002648:Child; D002652:Child Behavior; D002657:Child Development; D003213:Conditioning, Psychological; D006801:Humans; D007100:Imitative Behavior; D008297:Male; D009043:Motor Activity; D011336:Probability; D012054:Reinforcement, Psychology; D012919:Social Behavior