Teamwork is an incredible phenomenon. Importantly, teamwork requires interdependence among group members to achieve a superordinate goal. But interdependence among members, specifi cally the interdependence they portray through messages in interaction, is not well understood. Because no group member can predict what another group member might say (or perfectly predict his or her own contribution; cf. Warner, Letsky, & Cowen, 2005), “the fl ow of communication can follow virtually any path” (p. 270). Teamwork is always a partially improvised, fl exible dialogue among individuals. It is this property of conversation in teams that leads to new ideas, information sharing, and problem solving.