Like "The Three Faces of Eve", "Lizzie" deals with a title character suffering from multiple personality disorder (now known as dissociative identity disorder). However, I think this movie is a better treatment of the topic than its more famous counterpart, for two primary reasons.
One is the performance of Eleanor Parker, who does not disappear off camera and then come into the room as one of her alter-egos, but lets us see the shifts and changes as they occur. The other is its greater psychological realism - rather than giving us a cop-out about the trauma of seeing a dead body, "Lizzie" doesn't shy away from dealing with the topic of sexual abuse.
One is the performance of Eleanor Parker, who does not disappear off camera and then come into the room as one of her alter-egos, but lets us see the shifts and changes as they occur. The other is its greater psychological realism - rather than giving us a cop-out about the trauma of seeing a dead body, "Lizzie" doesn't shy away from dealing with the topic of sexual abuse.