Who is the narrator, can she or he read minds, and, more importantly, can we trust her or him?
First Person (Central Narrator)
This is a tough perspective when the narrator is slowly sinking into madness.
Is there really a woman creeping around outside in the bushes? Probably not. Is there really a woman trapped in the wallpaper? Definitely not. But is the pattern of the wallpaper interesting and confusing? Probably yes.
The author’s use of the first person to convey the story allows readers to go along for the ride into madness and cultivates a certain amount of sympathy for the narrator and her plight. The constant use of "I" puts us right in the narrator’s head and allows us to empathize with her.