AGPA at 75: Past, Present, and Future.

This special issue of IJGP celebrates the 75th anniversary of the founding of AGPA in 1942. We asked clinicians representing 18 group therapy models to apply their knowledge of the model to a clinical vignette. Their responses to the eight questions were often illuminating. The depth and breadth of contributions to this anniversary issue celebrate the fundamental health of our "large group" institution-one that is committed to the pluralistic and evolving nature of the professional family we call AGPA.