In the book "Packing for Mars," author Mary Roach explores the unique psychological and psychiatric requirements for astronauts. One notable attribute emphasized in a Space Shuttle-era NASA document is the ability to tolerate boredom and low levels of stimulation. This trait is crucial for astronauts who may spend extended periods in isolation and face monotonous environments while in space.

The focus on this capacity highlights the mental challenges associated with space travel, where the lack of sensory input and the need for prolonged focus can lead to psychological strain. Roach delves into how meeting these psychological demands is vital for ensuring the well-being and performance of astronauts during missions.