Peter Sturmey is Professor of Psychology at Queens College and the Graduate Center, City College of New York, and a visiting professor at The Department of Dentistry, University College London. He is an Associate Editor for Research in Developmental Disabilities and Research in Autism Spectrum Disorders. Professor Sturmey has published widely on developmental disabilities such as autism, clinical case formulation, staff and parent training, restrictive behavioral interventions, and behavior analytic approaches to psychopathology.

Robert Didden is Professor of Intellectual Disabilities, Learning and Behaviour at the Behavioral Science Institute and School of Education of the Radboud University Nijmegen, The Netherlands. He is a psychologist at Trajectum, a center for the treatment of clients with mild to borderline intellectual disabilities and behavioral and psychiatric disorders. Professor Didden is an associate editor for Review Journal of Autism and Developmental Disorders and Journal of Developmental and Physical Disabilities.