She has been examining the types of personalities that would be best suited for such isolated and prolonged journeys. In San Francisco at the Association for Psychological Science, Bell presented a review of her research regarding types of personalities in “space analogue environments.” The main thing that she discovered was that in the process of choosing astronauts for missions to Mars, the strong, silent type is the best option. She points out that extroverts are likely too intrusive and in need of attention. The extroverted personality type could be too “warm” for settings that are largely confining.