title: Study of frustrative nonreward in children.
mesh_terms: D001288:Attention; D002648:Child; D002652:Child Behavior; D003213:Conditioning, Psychological; D005260:Female; D005639:Frustration; D006801:Humans; D007600:Judgment; D008297:Male; D012055:Reinforcement Schedule; D012201:Reward; D012858:Size Perception; D012923:Social Class; D014705:Verbal Behavior