The Picture Exchange Communication System (PECS) is a widely used picture/icon aided augmentative communication system designed for learners with autism and other developmental disorders. This meta-analysis analyzes the extant empirical literature for PECS relative to targeted (functional communication) and non-targeted concomitant outcomes (behavior, social skills, and speech) for learners with autism, learners with autism and intellectual disabilities and those with autism and multiple disabilities. Effect size analyses were done using the Improvement Rate Difference method, an advanced metric. Effect sizes were independently analyzed for targeted and non-targeted outcomes, student age, learner disability, and number of phases in the PECS protocol acquired by learners. Results supported the judgment that PECS is a promising intervention method. Analysis also revealed that functional communication outcomes associated with the PECS protocol were most impacted, that preschool children and those with autism generally showed the strongest training effects, and that in general students who advanced through the most PECS protocol phases had the best outcomes.

No abstract

Although electronic tools such as handheld computers have become increasingly common throughout society, implementation of such tools to improve skills in individuals with intellectual and developmental disabilities has lagged in the professional literature. However, the use of visual scripts for individuals with disabilities, particularly those with autism spectrum disorders, has been demonstrated to be effective, though frequently in static formats. Thus, this study involved the implementation of an alternating-treatment design to investigate the effects of tablet computer-based visual scripts on vocabulary use in three 8- to 14-year-old children with autism. Results indicated that all the participants showed increased use of verbs or nouns with the treatment materials, all the participants required less invasive prompts as the project progressed, and one participant had mixed results in the spontaneous use of nouns, increasing in their use in treatment and nontreatment conditions.

Video-based modeling (VBM), a category of video-based instruction (VBI), is the process of recording a model engaged in a behavior with the intended goal that the video will be viewed and the desired behavior imitated (Delano, 2007;Hitchcock, Dowrick, & Prater, 2003). VBM has proven to be effective for teaching and improving a variety of skills for individuals with autism spectrum disorder (ASD) and developmental disabilities (DD; Bellini &