Although dissociative identity disorder (formerly called multiple personality disorder) is extremely rare and difficult to diagnose, it seems to be awfully popular with numerous Hollywood interpretations. The Three Faces of Eve does a fairly admirable job of conveying the disorder even though information defining the illness was (and still is) limited at the time the movie was made.
Eve White, Eve Black, and Jane, all played by Joanne Woodward, had distinct personalities. Eve White was the quiet, submissive homemaker who loved her husband and adored her little girl. …