American psychologist and author
According to Wikipedia,
Russell Alan Barkley is a clinical psychologist who is a clinical professor of psychiatry at the VCU Medical Center and an author of books on attention-deficit hyperactivity disorder . Involved in research since 1973 and a licensed psychologist since 1977, he is an expert on ADHD and has devoted much of his scientific career to studying ADHD and related fields like childhood defiance. He proposed to change the name of sluggish cognitive tempo to concentration deficit disorder .
Russell Barkley is affiliated with the following schools: