Participants subscribe by sending an e-mail message to the listserv.
Once subscribed, the particpant receives e-mail messages regarding the particular discussion list that they joined. If you do this, everyone will receive the message and usually lots of people get annoyed. Like many academic disciplines, community psychology has a variety of different discussion lists dedicated to community-based issues. Out of all the listservers this is the one with the most traffic. There is approximately 450 list subscribers and the list is open to professionals, researchers, students, and all else interested in community psychology, prevention, and action research.