Research shows that people do better with treatment in groups. It is shown that the treatment outcomes are better when patient do treatments that are suitable to be done in groups compared to individual therapies. But why? It appears that there are multiple benefits in taking part in group therapies. Patients feels that they are not left alone and there are people who care about them. They tend to build a support group out of the members of group and help each other in the road to recovery. Patients tend to get into a state of feeling accountable to other members for doing their best to get better. They see that they are not alone and their problems have happened to many others who are working as hard as them to get better. There is a feeling of belonging and camaraderie that take the mood of groups.
In general, humans do better in groups for any activity, therapy is not an exception.