Dr. Allen received his Ph.D. from the Joint Doctoral Program in Clinical Psychology at San Diego State University and The University of California, San Diego, recently cited as the top clinical psychology doctoral program in the country by The Chronicle of Higher Education. He completed his predoctoral internship in clinical neuropsychology at Long Island Jewish Medical Center and his postdoctoral residency in clinical neuropsychology at The University of Texas Southwestern Medical Center at Dallas. He is an Assistant Professor in the Department of Psychiatry at The University of Texas Southwestern Medical Center at Dallas, where he is a full member of the Graduate Faculty in Clinical Psychology and in Rehabilitation Counseling Psychology. He is also an Adjunct Assistant Professor of Cognition and Neuroscience in the School of Behavioral and Brain Sciences at The University of Texas at Dallas. Dr. Allen is a licensed clinical psychologist specializing in neuropsychological assessment. He also has received specialized training and certification in the diagnosis of autism spectrum disorders. In addition to his clinical training in psychology and neuropsychology, Dr. Allen has extensive experience in cognitive neuroscience research using magnetic resonance imaging. The major emphasis of his research is to understand the brain basis of autism spectrum disorders and other developmental disorders such as Down syndrome. The specific focus of this work currently is the investigation of cerebellar function and the potential contribution of cerebellar dysfunction to the behaviors and symptoms of autism. Dr. Allen has received funding from the National Science Foundation, the Cure Autism Now Foundation, and Autism Speaks. Findings from his research have been presented at international meetings and published in some of the most prestigious journals, including The American Journal of Psychiatry, Biological Psychiatry, NeuroImage and Science.