title: Helping behavior among normal and retarded children.
mesh_terms: D000367:Age Factors; D002648:Child; D002652:Child Behavior; D002657:Child Development; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008607:Intellectual Disability; D007360:Intelligence; D007398:Interpersonal Relations; D008297:Male; D009042:Motivation; D012919:Social Behavior