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.

• Contributors vii Preface xiAcknowledgments xvPart I Foundational Issues and Overview 11 Evidence-Based Practice: An Introduction 3Peter Sturmey2 Adaptive Behavior 29Peter Sturmey3 Maladaptive Behavior 62Peter Sturmey4 But Is It Worth It? 85Peter SturmeyPart II Specific Disorders and Challenging Behaviors 1015 Aggressive Behavior 103Olive Healy, Sinéad Lydon, and Clodagh Murray6 Self-Injurious Behavior 133Jeff Sigafoos, Mark F. O’Reilly, Giulio E. Lancioni, Russell Lang, and Robert Didden7 Stereotypic Behavior 163Timothy R. Vollmer, Amanda B. Bosch, Joel E. Ringdahl, and John T. Rapp8 Feeding Problems 198Keith E. Williams, Laura J. Seiverling, and Douglas G. Field9 Sleep Problems 219Robert Didden, Wiebe Braam, Anneke Maas, Marcel Smits, Peter Sturmey, Jeff Sigafoos, and Leopold Curfs10 Anxiety Disorders 235Peter Sturmey, William R. Lindsay, Tricia Vause, and Nicole Neil11 Mood Disorders 261Peter Sturmey and Robert Didden12 Offenders with Developmental Disabilities 280Peter Sturmey and Klaus DrieschnerIndex 292