dissociative identity disorder

Full Definition

Dissociative Identity Disorder (DID), formerly known as multiple personality disorder, is a severe dissociative condition involving the presence of two or more distinct identity states that recurrently control behavior. Each identity may have unique memories, behaviors, and personal characteristics. DID typically develops as a response to severe childhood trauma and represents a complex adaptation to overwhelming stress. The condition is often accompanied by significant memory gaps and functional impairment.

Usage

Usage note: Formerly called multiple personality disorder; avoid outdated terminology in professional writing.

In Context

• "The patient met criteria for dissociative identity disorder following comprehensive assessment." — diagnostic evaluation
• "Treatment planning for dissociative identity disorder requires specialized expertise." — referral documentation