This paper focuses on computer-supported collaborative learning (CSCL) among foreign language (FL) graduate students from three universities, who worked together to create a wiki. In order to investigate the nature of CSCL among participants, this qualitative case study used the Curtis and Lawson framework (2001) to conduct a content analysis of learners' collaborative behaviors. Transcript and survey analyses indicate that the success of collaborative interaction depends largely on the group members themselves. Differing levels of participation indicate that not everyone was equally involved with the wiki project, which ultimately affected the level of collaboration, the group dynamics, and the final product. In addition, the leader in each group influenced the degree of collaboration taking place in her group. (Contains 5 tables and 2 figures.)