- Somewhat a controversial mental disorder: very few people suffer from it (1% of world's population), and it's mainly in the U.S.
- A rare disorder in which a person exhibits two or more distinct and alterning personalities. The person might have suffered from a trauma and feels like they have to have different personalities to overcome it.
- Popularity in Movies:
Three Faces of Eve (1957)
Fight Club (1999)
- Video of Tony:
has 53 personalities
during his therapy session, different personalities come out and bodily changes occur when a different personality comes out. - Ex: Dede knows everything.