About the Author

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Johnny L. Matson, Ph.D., is Professor and Distinguished Research Master in the Department of Psychology at Louisiana State University, Baton Rouge. He has served as major professor for 69 doctoral students over a 42-year career and has more than 850 publications, including 45 books. He is founding editor for the Review Journal of Autism and Developmental Disorders.Peter Sturmey, Ph.D., is Professor of Psychology at The Graduate Center and Queens College, City University of New York. He has published more than 500 articles, chapters, and conference papers as well as 25 authored and edited books.