Psychology - Multiple Personalities

In early times, evil spirits were thought to possess people and make them act in strange and frightening ways. By the 1800s, the study of this hysteria led some doctors to believe one person could have separately functioning personalities. In this rare research film from the 1920s, a woman has different personalities who believes they are separate people. One is a male that is not comfortable in womens clothes. Another is a small child. The affliction has been known by different names, but recognized for centuries. Today it is called multiple personality disorder. Why have they become tormented and broken into different personalities? What is the childhood pain that lies buried in the unknown depths of their mind? How can they search for the deadly memories that holds the secrets of their paths and the promise of their healing?