Stichomythia

The questioning of Tom by Atticus is an example of stichomythia, a dramatic dialogue, characterized by brief exchanges between two characters, each of whom usually speaks in one line of verse during a scene of intense emotion or strong argumentation.

Harper Lee’s skillfully employs this literary device to intensify the tense atmosphere of the courtroom, to create momentum within the scene, and provoke a sense of urgency and trepidation in the reader.