***Study Notes on Dissociative Identity Disorder (DID)

Dissociative Identity Disorder (DID)

  • Formerly recognized as multiple personality disorder.

  • Defined as a mental health condition where an individual may adopt up to 100 different identities (also known as alters) that coexist within one body and mind.

Key Concepts

  • Alters: The different identities that inhabit the same body/mind of a person with DID.

  • Switch: The transition from one personality (alter) to another. This switch may involve physical transformations.

  • Research suggests that individuals with DID are not intentionally faking their symptoms; objective tests support this assertion.

  • Malingering: The act of faking symptoms for personal gain must be considered if there is an incentive for doing so.

Prevalence and Onset

  • Prevalence: DID may be more common than previously estimated, with a prevalence rate of approximately 15% in the USA.

  • Onset: The disorder can manifest at any age, beginning as early as 4 years old.

Course and Comorbidity

  • Course: The disorder tends to remain stable in the absence of treatment.

  • Comorbidity: DID frequently occurs alongside other mental health disorders, including:

    • Substance use disorder

    • Depression

    • Somatic symptom disorder

    • Borderline personality disorder

    • Personality disorders (PD)

    • Eating disorders

Causes of DID

  • Biological Factors:

    • There is suspected biological vulnerability as identified in twin studies.

    • Sleep deprivation has been shown to produce dissociative symptoms.

  • Psychological Factors:

    • Dissociation is considered a defense mechanism.

    • Suggestibility is proposed as a speculative explanation for the development of DID.

  • Environmental Factors:

    • The leading cause of DID is childhood interpersonal trauma, with approximately 90% of cases related to child abuse.

    • The trauma is often compounded by a lack of support during formative years.

Comparison: DID vs. PTSD

  • DID shares important similarities with Post-Traumatic Stress Disorder (PTSD), notably both conditions involve intense emotional reactions to severe trauma.

  • DID may be considered an extreme subtype of PTSD, characterized by a greater emphasis on dissociation rather than anxiety.

Time-Sensitive Window

  • There is a critical time-sensitive window for the development of DID that closes at 9 years of age. If severe trauma occurs before this age, the likelihood of developing DID is significantly increased.

Treatment of DID

  • Treatment often involves attempts to reintegrate the various personalities (alters) through long-term psychotherapy, which may include techniques such as hypnosis.

  • The strategies used to treat PTSD are commonly applied in the treatment of patients with DID.

  • It is essential for patients to confront and relive aspects of past trauma during therapy to aid in transforming those memories into non-threatening recollections rather than experiencing them as current events.