Because of the complex range of factors to be considered in pscyhosis -genetic, neurologic, biologic, environmental, family, culture - this issue of Child and Adolescent Psychiatric Clinics presents aspects that have the greatest relevance and impact in diagnosing and treating child and adolescent patients. Among some of the topics covered: Schizophrenia, Affective disorders and Psychosis, Comorbid diseases, Neurocognition, Genetics, Neuroimaging...