The average intelligence of the people in the group and the maximum intelligence of the people in the group doesn't predict group intelligence. […]
So how do you engineer groups that can problem-solve effectively? First of all, seed them with, basically, caring people. Group intelligence is correlated … with the average social sensitivity -- the openness, and receptiveness, to others -- of a group's constituents. The emotional intelligence of group members, in other words, serves the cognitive intelligence of the group overall. And this means that -- wait for it -- groups with more women tend to be smarter than groups with more men.