What is the author's style in The Shrike by Joseph Kramm?

The play is written in a documentary style, focusing on the daily experiences of the main character as he tries to navigate the world of a city psychiatric hospital. Jim Down's point of view dominates the play, as he struggles to cope with the restrictive situation in which he finds himself. The audience never gains a clear look at the motivations behind the behavior of the doctors and of Ann. Kramm places the focus instead on tracing one man's complete loss of freedom and the effect that loss has on him. As a result, audiences get an in depth portrait of one man's painful resignation and ultimate defeat as his autonomy is stripped away.