Clinically defined prodromal diagnostic criteria identify at-risk individuals with a 35-40% likelihood of developing a psychotic disorder within a year. The time course and predictive value of cognitive deficits in the development of psychosis has not been established.

Keefe RSE, Perkins DO, Gu H, Zipursky RB, Christensen BK, Lieberman JA. A longitudinal study of neurocognitive function in individuals at-risk for psychosis.  Schizophrenia Research 2006; 88(1-3): 26-35.