Schizophrenia is a brain disorder that affects approximately one per cent of the population. Its main symptoms include hallucinations, delusions, and disorganized speech and behavior. Patients also have significant social and work difficulties. Want to know if you or your friends or family are suffering from schizophrenia? Take a short test to answer the following 15 questions to help you or your friends initially identify the symptoms and risks of schizophrenia.