However , long - term intensive interactional group psychotherapy assumes diverse and diagnostically heterogeneous group membership , and an open - ended time scale for therapy .
Most outcome research is carried out using time - limited therapy with diagnostically homogenous groups .
Long - term intensive interactional group psychotherapy assumes diverse and diagnostically heterogeneous group membership , and an open - ended time scale for therapy .
Most outcome research is carried out using time - limited therapy with diagnostically homogenous groups .