I’m not by any means an expert on the subject but i’ve read the book Dissociative Identity Disorder Sourcebook by Deborah Haddock as well as the portions of more general psych textbooks, abnormal psych textbooks, & case studies that deal with DID and related disorders. I’m not an expert on psychology either i hasten to point out, just very interested in the subject. Especially abnormal psychology.
It’s been too long since i read enough on it to write anything particularly coherent on the subject so i’ll just jot down some bullet points of interest on what i recall.
The disorder is very closely related to Post Traumatic Stress disorder. And not all that related to Schizophrenia despite them often being considered similar(or even the same thing) by the laymen and the media. The disorder always or almost always follows from an exceptionally traumatic event.
There’s often not a complete division on the states and it’s rarely the case where there is only two states. Switching between states is rarely as dramatic as seen on TV & the like. And is often seen by friends and family as normal, or extreme, mood swings. An undiagnosed individual suffering from DID may just be seen as an eccentric or moody person.
Some psychologists don’t consider it to be necessarily maladaptive. The treatment goal is not always to integrate the personalities. Sometimes the treatment goal is to… well i couldn’t think of how to put it so i went and grabbed the book i mentioned: “Some people, however, feel that an equally viable goal is that of co-consciousness, with each part working in cooperation with the others, much like members of a family might operate if they hope to live in any kind of harmony.”
DID is often(well not often it’s extremely rare, but often among cases of DID) discovered when a patient comes in complaining of depression. The patient may not even be aware that they are coping with the disorder.
In some cases one state will black out or not remember the events that happen while a different state is in control. In other cases states are aware of what’s happening(or at least have memory of what happened) even if they are not necessarily aware of the fact that multiple states exist. In all cases, however, there is some form of memory loss too extensive to be attributed to normal forgetfulness.
There is an unusually high prevalence amongst very heavy drug users. I do not believe it’s known whether the drugs cause the disorder, cause the disorder to be more likely to be misdiagnosed, or are examples of people self medicating.
I don’t necessarily see the distinction. You could easily call DID a subtype of PTSD and that wouldn’t mean it doesn’t exist. Or perhaps a type of cyclical fugue brought on by a traumatic event. Any two individuals suffering from any psychological disorder are very unlikely to exhibit the same symptoms in exactly the same way. Psychology, unfortunately, is simply not capable of being that divisive. And so we need to make, perhaps arbitrary, distinctions of where one disorder ends and another begins. It’s like looking at a spectrum and asking “where does blue end and green begin?” you have to draw the line somewhere or make increasingly more distinct subdivisions. But then you have to draw the line for those subdivisions anyway.
DID is simply a specific set of symptoms.
From the DSM-IV:
A. The presence of two or more distinct identities or personality states(each with its own relatively enduring pattern of perceiving, relating to, and thinking about the environment and self).
B. At least two of these identities or personality states recurrently take control of the person’s behaviour.
C. Inability to recall important personal information that is too extensive to be explained by ordinary forgetfulness.
D. The disturbance is not due to the direct physiological effects of a substance (e.g., blackouts or chaotic behaviour during alcohol intoxication) or a general medical condition (e.g., complex partial seizures).
They aren’t considered completely different personalities by mainstream psychology:
Nor is the creation of a new identity unique to DID. For example bullet #2 from Fugue State:
And the creation of a new personality is done by writers and story tellers on a routine bases. So i don’t see why someone would be sceptical that such a thing is possible. In DID, however, it is more internalized and taken to an extreme.
I can understand the scepticism. All of psychology is extremely subjective though, not just DID, and i don’t agree that DID is necessarily more subjective than more accepted areas of psychology.
I’m sure there’s a degree of over diagnosis though. But I’m of that opinion on most of psychiatry. According to wikipedia 1 in 100 Canadians suffer from DID. Which seems to me to be ridiculously high and screams of over diagnosis. Though i can’t be bothered to follow their cite at the moment as i’ve spent too much time composing this post as is.