Research has identified a variety of effective approaches for responding to errors during discrete-trial training. In one commonly used method, the therapist delivers a prompt contingent on the occurrence of an incorrect response and then re-presents the trial so that the learner has an opportunity to perform the correct response independently.…

Two procedures were compared for reducing violent or aggressive theme play of six preschool children with behavior disorders and five normally developing peers. Contingency statements followed by a modified time-out produced consistently lower rates of violent theme play than did verbal prompts to engage in more appropriate types of play.…