Psychological Doubling
Pairing the main character with a second character who mirrors them. The double shows what the hero wants, fears or secretly is.
How this film uses it
Elisabeth Vogler and Alma start as patient and nurse and end up impossible to tell apart. In the film's composite shot, their faces are literally merged. Bergman uses this doubling to ask a question. Is identity something stable that you own, or a performance you can only keep up when a separate person is there?
Where to see it
The composite face sequence. The camera merges Elisabeth's and Alma's faces into a single image. The doubling of their minds becomes literal, and then it becomes terrifying.


















