Dissociative Identity Disorder
Etiology
Arising From Abuse in Childhood?
- DID considered to be a strategy used by children to distance themselves
from abuse
- 89% report onset before age 12
Caution
- Retrospective surveys of patients or their therapists
- No prospective studies of abused children
- Many children are abused, but only some develop multiple identities...
Arising From Culture?
- More cases of MPD reported from 1981-1986 than in the preceding 2 centuries
- Highest in U.S. It’s a popular diagnosis.
Personality Characteristic – Hypnotizability?
Compared to general/psychiatric population:
- Easier to hypnotize
- More suggestible
- Power of suggestion
Convert severe but common disorders into more interesting “multiple personalities”
State Dependent Learning
- Sirhan Sirhan under hypnosis
- “RFK must die”
- Amnesia for event
Undiagnosed Epilepsy?
- Psychomotor seizures and amnesia for event
Part-suppression Hypothesis?
- Corpus callosotomy patient and “Lefty”
Behavioral Markers?
- These have been offered by proponents (Franklin 1990; Loewenstein 1991;
Putnam 1989, 118-123; Ross 1989, 232) as important diagnostic indicators:
o Glancing around the therapist's office
o Frequently blinking one's eyes
o Changing posture or voice's pitch or volume
o Rolling the eyes upward
o Laughing or showing anger
o Suddenly covering the mouth
o Allowing the hair to fall over one's face
o Developing a headache
o Scratching an itch
o Touching the face or the chair in which one sits
o Changing hairstyles between sessions
o Wearing a particular color of clothing or item of jewelry
Treatment
Psychodynamic Perspective
- “Working through”
- Expose trauma
Behavioral
- Reinforcement – positive and negative
- “Expert diagnosis”
- “Strategic enactments”
Nonreinforcement
- Family ignores other personalities
- Force person to take responsibility for actions of other personalities
- Case report resulted in less frequent behaviors of other personalities
Case History
- Other personality was assertive
- Dominant personality given assertiveness training
- Other personality disappeared
Conclusions?
Any people, given over to the power of contagious passion, may be swept
by desolation, and plunged into ruin.
-- Charles W. Upham, 1867