Inconsistent discipline of aggression in young boys

Two studies assessed the effects of interagent, inconsistent discipline on aggression in young boys. One agent responded to hitting behavior with verbal disapproval while another agent responded with verbal approval. In Experiment 1, the frequencies of hitting responses of first- and second-grade boys were examined under four schedules of adult reactions: (1) consistent disapproval; (2) consistent ignoring: (3) consistent approval; and (4) inconsistent discipline (approval from one agent and disapproval from the other). Aggressive responding was least frequent when met with consistent disapproval whereas the frequency of hitting responses in the inconsistent discipline condition was not different than that in the consistent approval and ignore conditions. In Experiment 2, the frequencies of hitting responses were examined under a schedule of consistent disapproval following a brief schedule of either: (1) inconsistent discipline; (2) consistent approval; or (3) consistent ignoring. Hitting behavior during consistent disapproval was greatest following a period of inconsistent discipline and least frequent following a history of consistent ignoring. These findings replicate the results of correlational field studies of the relation between inconsistent discipline and aggression in boys. In addition, these experimental studies demonstrate a causal link and the direction of effects between these variables.