How can groups make good decisions? Dan Ariely, behavioral economist, and neuroscientist Mariano Sigman have been inquiring into how we interact to reach decisions by performing experiments with live crowds around the world. Their insights include the following. "Good collective decisions require two components: deliberation and diversity of opinions. Right now, the way we typically make our voice heard in many societies is through direct or indirect voting. This is good for diversity of opinions, and it has the great virtue of ensuring that everyone gets to express their voice. But it's not so good [for fostering] thoughtful debates. Our experiments suggest a different method that may be effective in balancing these two goals at the same time, by forming small groups that converge to a single decision while still maintaining diversity of opinions because there are many independent groups."

How could a manager use this type of group decision making to make better decisions?