Thanks but i dont know much about it. So is science, they are not really sure about it.
Apparently, it can even work the opposite. According to research: CDB, a cannabinoid in cannabis helps, eases or minimalize the psychoses for schizophrenic people.
This might explain why psychotic/ schizophrenic people tend to smoke weed more often, due to the positive effects it can offer.
So when you would do a research on schizophrenia and you would interview these people they would say "he i smoke weed regularly and do whatever.. And bam there you got now they can say "30% of psychotic people smoke weed." Or some stuff like that... Looks interesting in magazines or wherever..
While in reality they didn;t even touched the subject properly. I think the false propaganda started this way.
Just my stoner cents..
Peace