This study examines collective identity, a concept that is used in social movement theory to understand why people are motivated to participate in social movements and social movement groups. Collective identity is a social-psychological process that links the individual to the group through a series of group interactions that revolve around social movement activity. This is a qualitative study that examines collective identity in an online social movement group and an offline social movement group. Reports from the two groups are compared to see what variation exists between these two different groups. This research is one of the first examinations of collective identity outside of conventional face-to-face group settings. The research presented in this thesis demonstrates the difficulty a social movement group that exists online might have in generating a collective identity because of an absence of face-to-face interaction. / Master of Science