What Is The Function Of Editing In Hitchcock's Psycho?

In Hitchcock’s “Psycho” we see the shower scene, one of the most cherished scenes in cinema history. As soon as Marion steps into the shower the viewer is given a sense of suspense and disorientation through the editing of the various close ups, extreme close ups and zooms. This editing functions as a way to reveal Norman’s perspective to the audience. The hectic, confounding editing changes the viewers point of view to that of a madman. When Norman begins to stab Marion the knife is actually never shown penetrating her skin, it is all implied, but due to the sound and quick editing we infer that it does. The sharp scratches in the music being in sync with the stabbing, and the sounds of the jabs all show relations between the editing and sound