RESUMO
One of the diagnostic characteristics of individuals with autism spectrum disorders includes engaging in restricted and repetitive behavior. Research has shown that individuals will often display problem behavior when access to restricted and repetitive behavior is blocked. The purpose of the current study was to evaluate the use of functional communication training and schedule thinning to treat aggression displayed by three children diagnosed with autism spectrum disorders when higher level restrictive and repetitive behavior was blocked. Further, we assessed whether all steps in a schedule-thinning sequence were necessary as well as extended the practicality of these procedures by removing the continuous signal during the delay to reinforcement. The results indicated that functional communication with schedule thinning reduced aggression related to blocking access to engaging in higher level restrictive and repetitive behavior for all participants.