Let's look at the actual wording, meaning look at DSM.
Here is how DID is defined in the current DSM-IV:
Dissociative Identity Disorder
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 behavior.
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 behavior during Alcohol Intoxication) or a general medical condition (e.g., complex partial seizures). Note: In children, the symptoms are not attributable to imaginary playmates or other fantasy play.
Here is what is proposed currently for DSM-V:
http://www.dsm5.org/PROPOSEDREVISIONS/P ... rders.aspx :
Dissociative Disorders Proposed to be Subsumed Under Other Diagnoses (No DSM-5 Criteria Proposed)
* Dissociative Fugue
* Dissociative Trance Disorder
Dissociative Disorders
H 01 Dissociative Amnesia
H 02 Dissociative Identity Disorder
H 00 Depersonalization/Derealization Disorder
H 05 Unspecified Dissociative Disorder
http://www.dsm5.org/ProposedRevisions/P ... spx?rid=57 :
Dissociative Identity Disorder
A. Disruption of identity characterized by two or more distinct personality states or an experience of possession, as evidenced by discontinuities in sense of self, cognition, behavior, affect, perceptions, and/or memories. This disruption may be observed by others or reported by the patient.
B. Inability to recall important personal information, for everyday events or traumatic events, that is inconsistent with ordinary forgetfulness.
C. Causes clinically significant distress or impairment in social, occupational, or other important areas of functioning. *
D. The disturbance is not a normal part of a broadly accepted cultural or religious practice and is not due to the direct physiological effects of a substance (e.g., blackouts or chaotic behavior during Alcohol intoxication) or a general medical condition (e.g., complex partial seizures). NOTE: In children, the symptoms are not attributable to imaginary playmates or other fantasy play.
Specify if:**
a) With non-epileptic seizures or other conversion symptoms
b) With somatic symptoms that vary across identities (excluding those in specifier a)
* The workgroup will further consider whether Criterion C is necessary
** These specifiers are under consideration.
A big problem with both DSM-IV and DSM-V is the common error of thinking that the above requires two personality states
in addition to the client (the host). Actually, the presenting patient is one personality state, so all that is required is evidence of one alter.