Johnny L. Matson, Ph.D., is Professor and Distinguished Research Master in the Department of Psychology, Louisiana State University (LSU), Baton Rouge, LA, USA. He is the author of over 800 publications including 41 books. Additionally, he is the founding editor of three journals; Research in Autism Spectrum Disorders, Research in Developmental Disabilities and the Review Journal of Autism and Developmental Disorders. His research focuses on the study of conditions that are comorbid with autism and/or intellectual disabilities.