The treatment of behavior maintained by automatic reinforcement (e.g. stereotypy) can present a unique challenge if practitioners cannot control delivery of the maintaining reinforcer. Further, some individuals might engage in stereotypy only when care providers are absent. In the current evaluation, an adolescent boy's hand¯apping was demonstrated to occur in the absence of social contingencies and care providers. To reduce the behavior, two treatment strategies were assessed. In the ®rst approach, verbal reminders to refrain from hand¯apping were delivered on time-based schedules. In the second approach (differential reinforcement of other behavior, DRO), we provided access to a preferred item contingent on prespeci®ed time lengths with no hand¯apping when the participant was alone in a room. Results of the investigation indicated that the verbal reminders were unsuccessful, whereas the DRO program resulted in near-zero levels of stereotypy. Copyright # 2002 John Wiley & Sons, Ltd.
EVALUATION AND TREATMENT OF COVERT HAND FLAPPINGAlthough the treatment of many forms of severe problem behavior has bene®ted from functional analysis methodology (cf. Iwata, Dorsey, Slifer, Bauman, & Richman, 1982/1994, the treatment of stereotypic and other behaviors that are maintained by automatic reinforcement continues to be problematic. As Vollmer (1994) described, because the automatic reinforcers maintaining problem behavior are not under the therapist's control, successful treatment of behavior is dif®cult. In many instances, treatment is more complicated because the behavior is most likely to occur when care providers are not present (i.e. the behavior is covert).To date, few studies have described the treatment of covert problem behavior. Grace, Thompson, and Fisher (1996) applied a differential reinforcement schedule to reduce the covert self-injurious behavior (SIB) of one participant. Reinforcers were delivered contingent on absence of permanent products (e.g. tissue damage) of the