John Goodrich Watkins (17 March 1913 - 12 January 2012) was a United States psychologist best known for his work in the areas of hypnosis, dissociation, and multiple personalities.
[1] With his wife, Helen Watkins, he developed ego-state therapy, which uses analysis of underlying personalities, rather than traditional talk therapy, to find the causes of psychological problems.
The most famous example of the use of ego-state therapy was the interrogation of the Hillside Strangler, in which Watkins solicited a confession by revealing the killer's multiple personalities.
Accordingly, the pain is not eliminated by the hypnotic intervention but is dissociated from conscious awareness and fully experienced by an underlying ego state.
The underlying ego state may suffer trauma as a result experiencing the pain.