The response of groups to the experience of coping with resource dilemmas has been an object of study by scholars in several of the social and behavioral sciences. Social norms, trust, and the perception of group identity form cooperative mechanisms critical to group cooperation. However, the opportunity to communicate has been singled out as the most important factor influencing group cooperation performance in resource dilemmas. Until recently, the content of that communication has undergone little examination. This article examines the relationships among topical and functional communication content, group performance, and participant perceptions of cooperative mechanisms in 97 experimental simulation groups. Detailed discussion of specific strategies was positively related, and discussion of general strategy, basic information exchange, and recapitulation of past occurrences in the simulation were negatively related to both amount of harvest from the resource pool and participant perceptions of equality norm emergence, trust, and group identity formation, among others. These perceptions were positively related with both the total amount and within-group equality of harvest.