Evidence‐Based Practice in the Classroom: Evaluating a Procedure for Reducing Perseverative Requesting in an Adolescent with Autism and Severe Intellectual Disability

Management of inappropriate behaviour is a major priority in special education. Evidence‐based practice dictates that interventions to reduce inappropriate behaviour should be evaluated at the individual level to demonstrate their efficacy in the classroom. This study illustrates the evaluation of an evidence‐based procedure (response interruption) for reducing perseverative requesting in an adolescent boy with autism and severe intellectual disability. The boy used a speech‐generating device to request snacks during baseline and response interruption conditions. During both conditions, the boy had to wait 30 seconds while the snack was being prepared. Requests that occurred during this wait interval were defined as perseverative. Intervention involved blocking perseverative requests and prompting the child to wait. An ABAB design was used to evaluate the effects of the response interruption procedure. The results demonstrated that response interruption effectively reduced perseverative requesting, while maintaining appropriate requesting at other times. The study illustrates how special educators might evaluate evidence‐based practice in the classroom.