Chris has low self esteem. For example, he cannot bring himself to ask a girl out on a date. He wants to be more confident and comfortable in social situations. Chris begins to see a psychologist, Dr. Thames. After several sessions, Dr. Thames is ready to tell Chris the cause of his problems. Dr. Thames tells Chris that he has low self-esteem because he was emotionally scarred from an event that took place as a child, but which Chris is unable to remember.
What theory of personality is the doctor using?