what is it called when a person with schizophrenia hears or sees things that do not actually exist?
Delusions occur in most people with schizophrenia. Hallucinations. These usually involve seeing or hearing things that don't exist. Yet for the person with schizophrenia, they have the full force and impact of a normal experience. Hallucinations can be in any of the senses, but hearing voices is the most common hallucination. Disorganized thinking (speech).