what techniques did alfred hitchcock use for shadow of a doubt to create suspense

They also have an interesting conversation about traps. He is very against this because he knows that in reality he cannot do this, and if he could, he wouldn't be able to live without her.

When Marion suggests that he put his mother away 'some place' (referring to a mental institution), he reacts very seriously to this. ' This shows us his curiously devoted relationship, in which he seems to only ever talk to his mother, denying himself of any friends. Their talk turns to mother surprisingly often, as we begin to see Norman's affection for her. Norman, or mother, killed Marion at night whilst she was most vulnerable. The key bird featured is an owl over Norman, which is a nocturnal hunter. Maybe it is to suggest that Norman is one of these predatorial birds, and Marion is soon to be his prey. This use of proxemics shows them looming over him, like his mother looms over his life, watching the conversation take place.They are also representative in that all of these birds are birds of prey. The birds have a significant role in this scene.

What techniques did alfred hitchcock use for shadow of a doubt to create suspense