I don't think sz would be less stigmatised if a blood test revealed a dopamine problem. People don't fear the cause of sz, they fear the behaviour associated with it. If blood tests could prove dopamine problems, then society would push even harder for drug treatment for anyone who has a sz diagnosis, both out of fear of violence, but also because society buys into illness=medicine. If you have a biochemical problem, insurance companies and the NHS etc aren't going to want to 'waste' money on therapy for you. You found CBT very helpful - what if you'd tested 'positive' for psychosis and (supposing you weren't in a trial) your insurance refused to pay for therapy because you have a biochemical issue that requires meds only?

*Willow*