Abstract
This article advances the general argument that the importance of communicationfor group decision-making performance and its impact on such performance are a function of three task characteristics: structure, information requirement, and evaluation demand. In developing this argument, the article identifies the task circumstances in which group communication can be expected to play a role in determining decision-making performance, as well as specifying how communication functions within those circumstances to affect decision efficacy. The article concludes with concrete directions and suggestionsforfuture research.