Virtually all members of the Independent Catholic movement possess "a deep commitment to the catholic (in the broadest possible sense) sacramental tradition" and worship according to a prescribed liturgy, usually derived from a mainstream Christian rite (like the Roman rite). Plummer suggests that "the most critical factor for independent sacramental identity is the single-minded focus on sacramental activity...that very few independent communities offer coffee hour, Sunday School, and the array of other social programs which have come to characterize many mainstream churches."