We systematically reviewed more than 25 years of applied research examining the system of least prompts response prompting procedure with individuals with disabilities. We identified 123 peer-reviewed studies including 413 participants receiving instruction with the system of least prompts. A total of 252 experimental designs were evaluated, with 51 designs indicating a functional relation and the presence of 154 demonstrations of effect across 91 individuals. Our data indicate that the system of least prompts is an evidenced-based practice for teaching chained responses related to community, self-care, and vocational skills to individuals with moderate intellectual disability who are 13 years of age or older. In addition, we present and discuss a method for analyzing and aggregating data from single-case studies to account for noneffects and publication bias when identifying if an intervention meets standards as an evidence-based practice.
Self-instruction using videos or other supports on a mobile device is a pivotal skill and can increase independence for individuals with disabilities by decreasing a need for adult supports. This study evaluated the effects of progressive time delay (PTD) to teach four adolescents with autism and intellectual disability how to initiate self-instruction in the presence of a task direction for an untrained task. Participants were screened for imitating video models prior to the study and were taught to navigate to videos on an iPhone(®) in history training. A multiple probe design across settings embedded in a multiple probe design across participants was used to evaluate the effects of PTD on initiation of self-instruction. All participants learned to self-instruct. Two participants generalized self-instruction to two novel settings. Two participants required instruction in two settings before generalizing to the third. Three participants generalized self-instruction in the presence of a task direction from the researcher to a task direction from their classroom teacher in all three settings. One participant generalized to a task direction presented by the classroom teacher in one setting, but not in the other two. All participants maintained self-instruction behaviors assessed 1 week after all participants met criteria in all settings. Self-instruction using videos or other supports on a mobile device is a pivotal skill and can increase independence for individuals with disabilities by decreasing a need for adult supports.
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