Computer Supported Collaborative Learning (CSCL) is one approach that seemingly maps neatly to the notion of equipping learners for emergent knowledge-age work practice currently exemplified by Computer Supported Cooperative Work (CSCW) or Virtual Teams. However, the difficulty of achieving peer interaction in Computer Supported Collaborative Learning (CSCL) environments has proved to be a recurrent problem. Seemingly collaborative settings have been interpreted too narrowly referring only to positive phenomenon. There has been a tendency to focus on technology rather than social scaffolds. Little is known about the influence of students' personalities on online collaborative interaction and knowledge-building activity. Within collaborative team based contexts individuals demonstrate preferences towards certain activities. Such preferences and combinations of preferences may affect team knowledge-building activity both in terms of quality and efficiency. This thesis reports on the findings from a study that investigated if knowledge-building activity can be enhanced in tertiary education CSCL environments through the use of teams balanced by Team Role Preference.