Deficits observed in children with schizophrenia include problems with illogical thinking and loosening of associations similar in many ways to the difficulties observed in adolescents and adults with the disorder. This chapter reviews the developmental aspects of childhood schizophrenia relative to onset, clinical features, and of the disorder. In childhood schizophrenia auditory hallucinations are most consistently reported, in approximately 80% of cases. Particularly in younger children, hallucinations are more fluid and less complex than those usually observed in adults with the disorder. The frequency of delusions begins to increase markedly in adolescence with the increase in schizophrenia. While schizophrenia can occur at any level of cognitive ability several studies have suggested a relation between schizophrenia and lower levels of intellectual ability. Various disruptive behaviors suggestive of conduct or oppositional disorders may be observed particularly in the prodromal stage of the disorder.