“…In autism, this core area is characterized by a variety of overt behavioral symptoms, including stereotyped motor behaviors (e.g., hand-flapping, body-rocking, object spinning), rituals and routines (e.g., ordering items or events, insisting on sameness), obsessional restricted interests (e.g., nonfunctional consuming interest in train schedules), and also a more general characteristic of rigidity/inflexibility and poor response to novelty [Rutter, 1985;Lewis and Bodfish 1999;Bodfish et al, 2000]. To date, the treatment of the repetitive behavior core features of autism has received far less study than the treatment of the social and communication deficits of autism.…”