By its nature, film is a visual medium, which makes a first-person story difficult to tell. To have Scout narrating throughout the film as she does in the book would prove distracting, so Scout as narrator is only presented to set the mood of a scene in the film. As a result, viewers don't get a strong sense of Scout's first-person narration as they do in the book; instead, they simply notice the childlike perspective portrayed in the story. (The film uses music to help reinforce the child's point of view. The music is very elementary, and much of the score is composed of single notes without chords or embellishments.)
Because the narration is not as straightforward in the film, the film seems to shift more to Jem's experiences. For example, Jem finds all the articles in the tree. Jem accompanies Atticus to tell Helen Robinson of her husband's death. Jem is left alone to watch his sister. Scout is still an important character, but the film expands on her brother's role.
