A psychologist and psychiatric epidemiologist, Dr Benjamin B. Lahey, is an expert in childhood psychological problems and the general P Factor for understanding psychological wellbeing. He is the Irving B. Harris Professor in the Department of Public Health Sciences and a Professor in the Department of Psychiatry and Behavioral Neuroscience at the University of Chicago.

Highly acclaimed for his influential research, Dr Lahey was one of the authors of the first articles that hypothesized a hierarchical organization of dimensions of psychological problems. The P Factor sat at the top. An authority on Attention Deficit Hyperactivity Disorder (ADHD), he was also part of the scientific panel that devised the current definition of ADHD in the 1990s.

A devoted teacher, in-demand speaker and revered scholar, Dr Lahey has published more than 200 articles and written multiple volumes of seminal texts on psychology.

He is a Fellow of the American Psychological Association and the Association for Psychological Science. He is also the former President of the International Society for Research in Child and Adolescent Psychopathology and the Society of Clinical Child and Adolescent Psychology.