1. Milieu therapy aims to provide a therapeutic environment to promote behavioral changes and improve psychological health. It involves pooling all resources including staff, patients, families, and the institution. 2. The goals are to provide a physically and psychologically safe environment, maximize psychological functioning, identify physical illnesses affecting symptoms, promote healthy coping strategies, and help patients gain independence. 3. Nurses play social, therapeutic, and supervisory roles by encouraging communication, role modeling, and manipulating the environment to have a therapeutic effect on patients.