DSM-IV-TR DID Criteria11
| 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. |
| At least two of these identities or personality states must recurrently take control of the person's behavior. |
| Patients have an inability to recall important personal information that is too extensive to be explained by ordinary forgetfulness. |
| The disturbance must not be due to the direct physiological effects of a substance … or a general medical condition. |