The purpose of this Intermediate Level course is to detail the symptoms and subtypes of Autism Spectrum Disorders (ASD), describe developmental and behavioral issues, outline assessment and diagnostic considerations, and briefly review the literature on the efficacy of various treatment approaches. It will also outline common GI problems and feeding difficulties in autism, exploring the empirical data and/or lack thereof regarding any links between GI disorders and autism. Sections on feeding difficulties offer interventions and behavior change techniques. A final section on nutritional considerations discusses unusual food preferences or sensitivities, growth and weight concerns, and food allergies and sensitivities with an objective look at the science and theory behind a variety of nutrition interventions. Professional Development Resources; 2008; 44 pages. This course was authored by Catherine Christie.