Abstract
This paper presents the theoretical foundation of group-mediated cognitive behavioural interventions (GMCB) in physical activity (PA). GMCBs use the power of the group to motivate members to learn and practice self-regulatory skills essential for changing and adhering to PA. Two theoretical perspectives guide the GMCB: social-cognitive theory (SCT; Bandura, 1997) and group dynamics (Cartwright, 1951, Yalom, 2005). Using SCT, the GMCB targets change in self-regulatory skills to produce associated change in self-efficacy and outcome expectancies which motivate persistence. Using the group as agent-of-change principle targets the group's common motivational base as a need for change (e.g., initiating activity, rehabilitation, mobility improvement). Participant-facilitator collaboration for learning and practice of change is emphasized. The rationale underlying group-mediation will be outlined. A clear distinction will be made between the GMCBs and other intervention approaches (e.g., unstructured group-delivery and team-building). Given that the GMCB is theory-driven, key features include a) establishing group properties, b) learning of behaviour modification and self-regulatory skills, c) integration of practiced skills and development of multiple-week PA plans, and d) decreasing group dependence to foster self-managed adherence post-intervention.Acknowledgments: Supported by SSHRC Canada Research Chair Funding