Here at VP-Trauma, we have decided to go away from the revolving door policy many treatment centers adhere to and make the program cohort-based. We have found that the key to a successful group program hinges on the establishment of trust between the client, facilitators, and other group members. When clients are coming in-and-out, it makes this challenging to accomplish. Furthermore, research is finding that the most effective groups have a common identity and a sense of shared purpose. A closed group program, or cohort, allows us to create groups of no more than 10 clients, that share a common aspect of their story, giving each member a greater opportunity to establish a new baseline for trust, promoting long-term recovery. In addition, it means the program has a beginning, middle, and end, removing the stress of wondering when time is up.