Dr. Nachi Felt, Ph.D., also known as the “ADHD Doctor,” is an ADHD & Executive Functioning specialist. He’s a professor at Columbia University where he teaches Psychopathology and co-directs the Cognition and Neuroscience Research Lab. Dr. Felt has developed his “Cycles of Clarity” technique, which is designed to empower fellow ADHDers to create their own clarity, confidence and control.