title: GROUP OPERANT BEHAVIOR: EFFECTS OF TAPE-RECORDED VERBAL REINFORCERS ON THE BAR-PRESSING BEHAVIOR OF PRESCHOOL CHILDREN IN A REAL-LIFE SITUATION.
mesh_terms: D002648:Child; D002675:Child, Preschool; D006126:Group Processes; D006801:Humans; D012054:Reinforcement, Psychology; D014705:Verbal Behavior
keywords: CHILD; GROUP PROCESSES; REINFORCEMENT (PSYCHOLOGY); VERBAL BEHAVIOR