A key feature of autism is restricted repetitive behavior (RRB). Despite the significance of RRBs, little is known about their phenomenology, assessment, and treatment. The Repetitive Behavior Scale-Revised (RBS-R) is a recently-developed questionnaire that captures the breadth of RRB in autism. To validate the RBS-R in an independent sample, we…

Analysis of staff perceptions of classes of reinforcers and aberrant behaviors of 480 people with predominantly severe or profound mental retardation suggested 8 classes of reinforcers (e.g., consumable, play) and 5 classes of maladaptive behaviors (irritability, lethargy, stereotypy, hyperactivity, and inappropriate speech). Each class of…

Research examining autistic symptoms in Angelman syndrome (AS) is limited. The goal of this study was to further characterize the nature of stereotyped behaviors, social interaction deficits, and developmental disturbances in individuals with AS. Parents of 248 individuals between the ages of 3 and 22 completed a survey of autistic symptomatology…