This FACT indicates the total number public psychiatric hospitals that are located in each Australian state. Psychiatric hospitals, also known as mental hospitals, specialize in the treatment of serious mental disorders. Psychiatric hospitals vary widely in their size and grading. Some hospitals may specialise only in short-term or outpatient therapy for low-risk patients. Others may specialise in the temporary or permanent care of residents who, as a result of a psychological disorder, require routine assistance, treatment, or a specialised and controlled environment. Patients are often admitted on a voluntary basis, but involuntary commitment is practiced when an individual may pose a significant danger to themselves or others. The state with the highest number is New South Wales with 8. The state with the lowest is shared between ACT and NT, each with 0.