Via collaboration between researchers and healthcare professionals, this project aims to enhance an existing telehealth system with hardware/software innovations and to validate its clinical performance for use with autism spectrum disorders (ASD). The specific aims of the proposed project are to introduce hardware and software video behavior capture on smartphones and novel interactive features, including tags for target behaviors, and to design modules to help train clinicians to use the online Behavior Connect telehealth system. In addition, two clinical studies will assess how the technology innovations impact clinical decision-making. These will be conducted in collaboration with Southwest Autism Research & Resource Center (SARRC) and with the Marcus Autism Center in Georgia. Based on caregiver captured video of child behavior in the home, the first study will evaluate the use of the technology for ASD diagnosis, and the second will evaluate the use of the technology for assessment of severity and function of problem behavior. If adopted widely by the autism research and clinical community, the enhanced system, once validated in the clinical studies, will significantly improve access to care among children with autism and developmental disabilities, as well as their families.