What are the new forms of psychotherapy for psychotic patients?

I've read that patients suffering from schizophrenia have high levels of dopamine. Are high dopamine levels the cause of schizophrenia or a consequence?

Is it possible to diagnose an 8-year-old child with schizophrenia? Can schizophrenia be detected in children? And if so, how might the treatment of a schizophrenic child differ from that of an adult?

Ridha Joober, MD, PhD, gave the fifth lecture :The Delusions about Schizophrenia And Psychosis.