A psychiatrist will diagnose schizophrenia when there is evidence of a profound break in reality manifesting itself in one or more of the following symptoms for several months.

• Thought insertion : the belief that someone is putting thoughts into the persons head.
• Thought broadcasting : the belief that others can hear the persons thoughts as they occur.
• Feelings of passivity : the belief that the persons thoughts and actions are being controlled by someone else.
• Hearing voices commenting on the persons actions.
• Other delusional beliefs out of the blue.
• Physical hallucinations : for example that someone is sitting on the person during the night.