Randomized, Controlled Trial of the LEAP Model of Early Intervention for Young Children with Autism Spectrum Disorders

Published May 25, 2011 in Topics in Early Childhood Special Education

A 2011 study supports the effectiveness of an early intervention model for autism spectrum disorder designed to be used in an integrated classroom. Randomized controlled trials are considered to be the gold standard of evidence; however, due to their complexity and cost, only four other RCTs of comprehensive interventions for young children with autism had been completed at the time this article was published. Of these four, all were tested in segregated environments and involved one-on-one instruction at the beginning of the intervention. In contrast, the LEAP (Learning Experiences and Alternative Program for Preschoolers and Their Parents) preschool model uses teaching opportunities that arise naturally in an integrated setting and incorporates typically developing students by training them to support the social skills development of their peers with ASD. The LEAP model is also the first evidence-based intervention for ASD to be tested in a public school setting. In the study, researchers compared the performance of students in 28 classrooms where teachers received personal training and coaching support in the LEAP model over two years to the performance of teachers in 28 classrooms who received only training manuals and written materials. While all children had equivalent skill levels at the start of the intervention, after two years the students in the coached classrooms showed marked improvement in symptoms of autism, cognitive scores, language development, social skills, and a reduction in problem behavior. The teachers' fidelity to the LEAP strategies predicted the students' level of improvement. These findings suggest that successfully adhering to LEAP strategies produces broad developmental improvements. It costs much less than other commonly used one-on-one strategies — an estimated $20,000 per child annually compared to $45,000 – $69,000.

–IACC 2011 Summary of Advances in ASD Research


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