Dissociative identity disorder requires what for diagnosis?

Dissociative Identity Disorder (DID) is characterized by 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 self and the world. These distinct identities can take control over the individual's behavior at different times, leading to noticeable differences in mood, behavior, and even physiological responses. Thus, the requirement for a diagnosis of DID is the identification of multiple distinct personalities within the same individual.

While a history of trauma, particularly in childhood, is often associated with DID, it is not a diagnostic requirement. Similarly, the presence of psychotic symptoms is not necessary for a diagnosis of DID, as the key features remain the disruption of identity. Therefore, the correct diagnosis hinges on the identification of multiple identifiable personalities, which is the essence of the disorder.