Behaviourism

After struggling for a while with his two forms, Banner met Doc Samson who helped him to make peace with himself.  Doc Samson believed he could control Banner's behaviour by identifying the factors that motivated his rage to begin with.  Through hypnosis, Samson tapped into Banner's subconscious and reached his inner spirit.  In doing this, Banner was forced to face his inner demons and the roots of his problems- his issues with his abused childhood and the murder of his dear mother.  Ultimately, Banner's multiple personalities merged and Banner was now able to control his mind while having the strength and body of the Hulk.