Size

Does the size of a group affect its dynamics? You bet! But how size affects the group depends on where you're looking.

As a rule, smaller groups are faster than their larger counterparts. But when it comes to decision making, larger groups end up scoring higher marks. So, if there's a decision to be made, it's wise to poll a larger group . . . and then give the input to a smaller group so they can act on it.

A side note about size: groups with odd numbers of people tend to operate better than those that have an even number, as it eliminates the issue of a tie when votes are taken. Groups of five or seven tend to be an ideal size, because they're still nimble like a smaller group, but they make solid decisions like a larger group does.