How Does Hitchcock Create fear and Tension Through the Structure of the Story Line in Psycho?

In this film Hitchcock does not use the traditional Hollywood equilibrium, disruption, solution pattern, as the main character is killed of 30 minutes into the film. It starts off traditionally with equilibrium, but there is no solution to the disruptions that occur.
The first half of the film is very uneventful; it is all build up to the events that take place in the second half of the film. The music has a strong role in the build up.
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