We compared a resetting to a non-resetting differential reinforcement of other behavior (DRO) procedure to reduce stereotypy exhibited by young boy with autism. During the resetting DRO, a reinforcer was delivered contingent upon the absence of stereotypy during the DRO interval. If stereotypy occurred, the DRO interval was immediately reset. The non-resetting DRO procedure was identical, except that contingent upon stereotypy, the DRO interval continued until it expired; a new DRO interval then began.Results indicate that the DRO procedures were equally effective to reduce stereotypy, but the participant preferred the resetting DRO procedure.