Early Pharmacological and Psychological Intervention for Late Prodromal States of Psychosis

Inclusion Criteria: 1. General criteria * Age between 14 and 36 years * male or female, in- or outpatients * written informed consent, for patients below 18 years also signed by parents 2. Special criteria (present within the last three months prior to the study) * Attenuated Positive Symptoms (APS) * Presence of at least one of the following symptoms: ideas of reference, odd beliefs or magical thinking, unusual perceptual experiences, odd thinking and speech, suspiciousness or paranoid ideation * Symptoms have to appear several times per week for a period of at least one week AND / OR * Brief Limited Intermittent Psychotic Symptoms (BLIPS) * Duration of episode less than one week, interval between episodes at least one week * Symptoms resolve spontaneously * Presence of at least one of the following symptoms: Hallucinations, Delusions, Formal thought disorder, Gross disorganized or catatonic behavior Exclusion Criteria: * Diagnostic and Statistical Manual of Mental Disorders (DSM) IV diagnosis of schizophrenia, schizophreniform,schizoaffective, delusional or bipolar disorder, at any time of life. * DSM-IV diagnosis of brief psychotic episode with a duration of more than one week, at any time time of life, or BLIPS within one week before inclusion. * DSM-IV diagnosis of delirium, dementia, amnestic and other cognitive disorders, mental retardation, mental disorders due to a general medical condition or mental disturbances due to psychotropic substances. * Abuse of alcohol or drugs within the last three months prior to the study; exception: cannabis user have to be drug-free during four weeks prior to the study. In case of drug abuse, it has to be determined, whether present prodromal symptoms appeared before any drug abuse; If not, symptoms have to be still present after a drug-free period of 3 months (hallucinogens, amphetamines), or four weeks (cannabis).