How is multiple personality disorder formed?

Multiple Personality Disorder, now known as Dissociative Identity Disorder (DID), typically develops as a coping mechanism in response to severe trauma, particularly during early childhood. The disorder arises when a child experiences overwhelming stress or abuse, leading them to dissociate from their identity and create distinct personalities or "alters" to manage the trauma. These alters can embody different traits, memories, and emotions, allowing the individual to compartmentalize their experiences. Over time, these dissociated identities can become more pronounced and may interact with each other and the primary personality.