How are 'Hitchcockian' themes, motifs and devices used in 'Psycho' (1960)?

Hitchcock uses blonde's in his films and also in this particular film 'Psycho'. This is because they seem more innocent than brunettes do and they stand out more in black and white films. He also uses 'the mother' in his films and in this film. The mother of Norman is seen as overprotecting, and quite strange person. You never get to see her face throughout the film which is another device - principle of concealment. This adds more mystery and creates enigmas for the audience. The mother is also used at the beginning of the film when we see Marianne and Sam's affair. Sam talks about turning mother's picture over so they can do 'stuff' but Marianne Crane shames her boyfriend as it is disrespectful to her mother. Hitchcock also uses voyeurism, once where Norman spies on Marianne in her room through a hole, and again at the start of the film where the camera goes through the window so the audience are seen as voyeurs intruding on someones private life. Long silences are used in 'Psycho' to create suspense and suspicion, for example when the detective is walking up the stairs there is a long silence until the mother comes out to stab him. It is like a way of telling the audience something bad is going to happen. The use of birds is prominent in 'Psycho', there are the stuffed birds in Normans parlour, the comment from Norman to Marianne saying "you eat like a bird" and Marianne's last name being of a bird 'Crane'. He also uses a device he created himself, a mcguffin. This device keeps the story moving along but in reality is irrelevant to the meaning of the story. In this case it is the $40,000.
In our film I would like to use voyeurism, as it gets the audience hooked being able to see things you shouldn't be able to. I also like this device because it is quite common in thrillers and it lets the audience know things that other people in the film don't neccesarily know.