Cognitive Behavior Therapy's Controversial Founder The psychologist who laid the intellectual foundations of cognitive therapy wasn't always lauded by the mental health community. In fact, Dr. Albert Ellis believed most psychologists and psychiatrists hated him -- and thought cognitive therapy was superficial. Ellis is now regarded as one of the most influential psychotherapists of the last century. NPR's Alix Spiegel reports. Editor's Note: This segment contains strong language.