Psychosis is a severe behavior disorder not directly attributable to central nervous system damage or mental retardation that disrupts social and occupational functioning. It is estimated that at least 1% of the world's population is affected by psychosis (Director-General of the World Health Organization, 1993). In the United States, the number of people diagnosed with schizophrenia-one form of psychotic disorder-exceeds 2 million (Bourdon, Rae, Narrow, Manderscheid, & Regier, 1994). Prevalence of psychosis is especially high within the ranks of homeless persons, one third of whom are believed to be "severely mentally ill" (Federal Task Force on Homelessness and Mental Illness, 1992) Economic costs to the nation for the treatment and care of persons with psychosis are substantial. In 1985, US. expenditures for psychiatric hospitalization, residential treatment, and short-term hospital care for persons 15 to 65 years old with "mental illness" were approximately $17 billion (Rice, Kelman, Miller, & Dunmeyer, 1990). A little-known fact is that more than 60% of the admissions for inpatient psychiatric care are to general hospitals rather than psychiatric hospitals. Of these general hospital admissions, more than half result in diagnoses of psychosis (Kiesler & Simpkins, 1993). Given this information, it is reasonable to estimate the 319