The effectiveness of two treatment strategies—verbal prompts and a physical prompt—on the the independent drinking skills of a 17-year-old girl with cortical visual impairment was investigated using a single-subject alternating treatments design in two settings. Ten natural drinking opportunities were observed in 43 sessions in the student's school and home. It was found that the physical prompt was highly effective in promoting the target behavior, whereas verbal prompts were less effective. Independent drinking behaviors appeared to have been maintained in both settings.
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