The modern use of dramatic process and theatre as a therapeutic intervention began with Jacob L. Moreno's development of psychodrama, an action-based form of psychoanalysis. However, although Moreno's psychodrama preceded the beginning and development of drama therapy by roughly half a century, the field of drama therapy established itself as a distinct modality within the creative arts therapies and cannot be seen as merely an evolved form of psychodrama. The field of drama therapy has expanded to allow many forms of theatrical interventions as therapy including role-play, theatre games, group-dynamic games, mime, puppetry, and other improvisational techniques. Often, drama therapy is utilized to help a client: