Attention Deficit Hyperactivity Disorder (ADHD) is one of the most frequently diagnosed psychiatric disorders in children and adolescents. Clinically referred preschool children with ADHD are significantly impaired, are at-risk for poor school outcome, and are frequent users of the healthcaresystem. Behavior problems in preschool children with ADHD persist to school-age years resulting in considerable stress for the entire family and staggering socio-economic burden to schools and society at large. This book provides the most comprehensive and up-to-date information regarding assessment - including diagnostic interview, neuropsychological testing, comorbidity and differential diagnosis, sleep problems - and treatment interventions including psychosocial, pharmacological and complementary andalternative treatments. All the chapters have a clinical focus and practical case examples are used to increase competency in clinical settings.ADHD in Preschool Children serves as a guide for experienced practitioners of child and adolescent mental health care as well as trainees in child and adolescent psychiatry, psychology, social work, pediatrics, family medicine and nursing. The chapter authors are national leaders with significantexperience in assessing and treating preschool children with ADHD and behavioral disorders.