What is the distinction between autism and childhood schizophrenia?

What will be an ideal response?

Although some researchers view autism as a psychosis, it is now considered a pervasive developmental disorder distinct from childhood psychosis. Whereas autism is often evident from early infancy, childhood psychosis rarely appears before age 7 or 8. Like schizophrenia in adulthood, childhood schizophrenia includes hallucinations and/or delusions and seems to involve similarities in brain anatomy to those found in adult schizophrenia. Autism is often associated with mental retardation, whereas childhood psychosis is not.