We study team performance solving a complex class of logic problems, nonograms. The value of solving the puzzles quickly and the cost of sending messages are systematically varied. Either adding a bonus for fast solutions or a cost for sending message significantly increases the likelihood that the group is able to solve the problem quickly (faster than median). Groups communicate frequently and are almost always on task, but sending more messages seems to harm performance. This suggests that teams are harming performance rather than helping it. Joint with Gary Charness, David Cooper, and Zachary Grossman.