Viewed by academics as one of the most influential psychologists of the 20th century, Jerome Kagan ranked above Carl Jung (the founder of analytical psychology) and Ivan Pavlov (who discovered the Pavlovian reflex) in a 2002 American Psychological Association ranking of the eminent psychologists. He is well-known for his pioneering work in developmental psychology at Harvard University, where he has spent decades documenting how babies and small children grow, and is an exceptional and highly-regarded researcher.
So it may be surprising to learn that he believes the diagnosis of ADHD (attention deficit hyperactivity disorder) is an invention — and only benefits the pharmaceutical industry and psychiatrists.