Norman maintains his integrity through division. Marian's unpredictability also reflects the existence of fragments.
I think Hitchcock deliberately divided the setting into two areas: motel and mother's house,
which respectively represent Norman's two consciousnesses. In the group of shots where Marian took a bath, assembly cuttings, or combination shots, were also used.
The world has no unified reflection. It is composed of countless individual mirrors (the nature of each mirror is also different). The
audience's curiosity about Norman reflects the limitation of individual mirroring.
After seeing the car with Marian's corpse gradually sinking into the swamp, the money in the car wrapped in newspapers was also wrapped in the car shell and finally wrapped in viscous mud. Marian's psychology fell silent, because in Norman's mirror image, Marian's psychology was just a tiny point.
Norman's psychology has never been explored in the detective's mirror image.
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