Diversity in the team? Psychology is important for everyone.
Certainly sa the saying goes "when in Rome, do as the Romans do" is an important aspect for the individuals. Bit how about a group of diverse individuals working as part of a team?
While the saying still goes, can't ignore the bit of tolerance you will need to cope with differences. Going more diverse brings strengths for the company but without the right team psychology diversity can result in a double edge sword. Start from making sure the mission, vision and strategy is well understood and accept the fact that everybody is different so know what to expect from each member encouraging everybody to care about the common goal and put aside the differences.