MODEL RELEASED. Split personality. Composite image depicting a man with a split or multiple personality. The top of the man's head has swung open to reveal separate images of him looking sad, angry, & happy. People who suffer from this disorder have two or more separate personalities, each of which dominates their behaviour at different times. The personalities are often very different from each other. Multiple personality disorder should not be confused with schizophrenia, a condition which leads to a split between thought and emotion.