“…In children who show typical development, the playing skill emerges on its own, with limited adult assistance and modeling, and has the quality of being a natural reinforcer (Lovaas, 2003). The development of play skills in children with ASD differs significantly from that of their peers in terms of participating in play activities and peer interaction (Liber, Frea, & Symon, 2008). Children with ASD tend to occupy themselves with part of an object for a period of time, and their interaction with the item often cannot be regarded as play because the object is not used in line with its purpose (e.g., removing a toy car's wheels and spinning them around, shaking part of a toy with a hand) (Naber et al, 2008;Rutherford, Young, Hepburn, & Rogers, 2007).…”