Multiple Personality Disorder

I wonder where mental illness figures into this notion of consciousness. Is that just another manifest image as opposed to a real image? When someone is psychotic? What do you think? Well you know some years ago Nick Humphrey and I spent a year investigating multiple personality disorder. The question of the extent to which it's eye-atrogenic caused by the doctor is still an open question. There are certainly some quite robust cases of multiple personality disorder where there's two or three selves inhabiting a single body but they have a somewhat different manifest image.