Research- How does the trailer 'psycho' fulfill the codes and conventions of the genre of thriller?

The first thing you can identify is the black and white coloring, this tells us that the film is dated, the lack of color almost makes it appear more chilling. The use of quick cutting in the establishing shot of body parts followed by a silhouette of a figure holding a knife instantly indicate that some type of violent attack either has happened or is on the approach. This immediately makes the audience speculate and try to put the pieces together, it leads us to believe where about the murder could of took place, though it preserves a sense of mystery. Combined with stereotypical screeching non diegetic music, from the outset of the trailer we immediately know that the genre is thriller. Low key lighting is used to create the outline of a figure, we can see this from what we can assume is through the victims prospective. The fact we cannot see his face is unnerving, the fear factor is increased as to us he is the unknown. We are then introduced to a hotel through a long shot, this shows that it is out of the way, it is described as 'a quiet little hotel' however theirs almost a sense of irony as Hitchcock says this. The music starts to slow down to coincide with the scene this shows that the non diegetic sound is linked to the action of the trailer so therefore it adds to the creepiness, building tension when it needs to. We see from within a car pulling up into the hotel that there is a rainstorm outside, this is a common convention of a thriller film as it alludes to something bad happening. The narrators role has been filled by one of the characters in the film, this helps make sense of some of the visuals and increases the thrill. We are shown montage editing closeups, revealing facial expressions of particular character, important object and just general clues, due to the lack of order it leaves us to feel disorientated which is another key convention. There are various shots of shadows this again adds to the mystery as we have no idea who the shadow belongs to and what there intention it has.