Effects of Neurocognitive and Social Cognitive Remediation in Patients at Ultra-High Risk of Psychosis

Inclusion Criteria: * Age 18-40 yrs. * Fulfill criteria for being at Ultra-High Risk of psychosis (defined by one or more of the following): * Vulnerability (Trait and State Risk Factor) Group: Individuals with a combination of a trait risk factor (schizotypal personality disorder or a family history of psychotic disorder in a first degree relative) and a significant deterioration in functioning, or sustained low functioning during the past year. * Attenuated Psychotic Symptoms (APS) Group: Individuals with sub-threshold (intensity or frequency) positive psychotic symptoms. The symptoms must have been present during the past year. * Brief Limited Intermittent Psychotic Symptoms Group (BLIPS): Individuals with a recent history of frank psychotic symptoms that resolved spontaneously (without antipsychotic medication) within one week. The symptoms must have been present during the past year. * Provided informed consent. Exclusion Criteria: * Past history of a treated or untreated psychotic episode of one week's duration or longer * Psychiatric symptoms that are explained by a physical illness with psychotropic effect or acute intoxication (e.g., cannabis use). * Diagnosis of a serious developmental disorder, e.g,. Asperger's syndrome * Currently receiving treatment with metylphenidate. * Rejects providing informed consent.