Did they login? Patterns of anonymous contributions to online communities

Researchers studying user behaviors in online communities often conduct analyses of events collected in system logs, e.g., a system’s record of a comment post or of a contribution. However, analysis of user behaviors is more difficult if users make contributions without being logged-in (i.e., anonymously). Since a user’s account will not be associated with contributions that user makes anonymously, conclusions about user behaviors that look only at attributed actions might not account for a user’s full experience.