"Conners 3rd Edition" is the most updated version of a series of measures for assessing attention deficit hyperactivity disorder (ADHD) and common comorbid problems/disorders in children and adolescents ranging from 6 to 18 years of age. Related problems that the test helps assess include executive dysfunction, learning problems, aggression, and problems with peer/family relations. Diagnostic criteria for the disruptive behavior disorders are also part of the scales. The test consists of self-report, parent, and teacher questionnaires and items that are based largely on the American Psychiatric Association's "Diagnostic and Statistical Manual, 4th Edition, Text Revision (DSM-IV-TR)" and principles of the "International Statistical Classification of Diseases and Health-Related Problems" (ICD). Theoretical foundations based on specific features of ADHD include emotional, social, cognitive, behavioral, sensorimotor, adaptive functioning, and treatment aspects. The test authors focused on clear identification of these features and especially noted positive impacts of ADHD, such as enthusiasm and creativity. (Contains 1 table.)