Russell Barkley

Russell Alan Barkley FAPA (born December 27, 1949) is a retired American clinical neuropsychologist who was a clinical professor of psychiatry at the VCU Medical Center until 2022 and president of Division 12 of the American Psychological Association (APA) and of the International Society for Research in Child and Adolescent Psychopathology. Involved in research since 1973 and a licensed psychologist since 1977, he is an internationally recognized expert on attention-deficit hyperactivity disorder (ADHD) and has devoted most of his scientific career to studying ADHD and its related fields like childhood defiance. He proposed the renaming of sluggish cognitive tempo (SCT) to cognitive disengagement syndrome (CDS).