A self-attention approach to the effect of the group on the individual is applied to the phenomenon of participation in religious groups. Previous work indicates that group members become more self-attentive, and thus more concerned with matching to standards of appropriate behavior, as the relative size of their subgroup decreases. This suggests that, in the context of religious groups, members of a congregation will be more self-attentive, and thus more likely to participate in the religious group, when there are fewer congregation members relative to the number of ministers. The results of analysis of ten archival records of participation in religious groups support this perspective. The importance of self-attention processes in religious group settings is discussed.