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A withdrawal design study evaluated the effectiveness of using constant time delay to teach six adults with a developmental disability to program and use an iPod touch® as an electronic photographic activity schedule (ePAS). The ePAS, created with the First Then Visual Schedule app, consisted of photographs of different exercises to complete during their workout time at the recreation facility on their community college campus. Dependent variables included the percent of correct steps programming the device and the percent of exercises completed correctly. All participants learned to program their iPod touch® within six sessions and maintained the skill during the second intervention condition. For generalization, participants programmed self-selected exercises into the device and performed each exercise.
Uphold et al. (Tue,) studied this question.