“…Few systematic investigations have directly addressed the causes of rocking. Therefore, we must look to the results of descriptive and behavioral intervention studies of children who are blind to identify factors that may contribute to or be associated with the development of stereotypic rocking (e.g., Bonadonna, 1981;Brambring & Troster, 1992;Dave, 1992;Fazzi et al, 1999;Jan, Freeman, & Scott, 1977;McHugh & Lieberman, 1997;McHugh & Pyfer, 1996, 1999O'Donnell & Livingston, 1991;Ohlsen, 1978;Pereira, 1990;Siegel, 1967;Thelen, 1981). These factors include the etiology of the visual impairment, early hospitalizations and surgeries, physical and cognitive impairments, the lack of opportunities for physical activity, the extent of visual impairment, and age.…”