This study investigates group members' perceived communication outcome variables across three CMC systems. The outcome variables were perceived satisfaction, decision confidenece, immediacy, effectiveness, and system ease of use. The role of communication medium and individual characteristic, specifically gender, on perception differences was explored. The results lend support to the argument that perception of communication outcomes differs by CMC medium, gender, and group gender composition status. Specifically there were medium effects for all the five outcome variables. Gender effect was found for three of the variables, which consist of perceived immediacy, decision confidence, and effectiveness. Interaction of medium and gender, and group composition status effects were also found for these three variables. The results also provide some support to the notion that perception changes over time. The discussion addresses implications for mixed gender group and CMC interaction.