The negative and positive symptoms of psychosis are mainly for patients with schizophrenia and are two separate groups of syndromes. Negative symptoms are deficits in the patient’s original functioning due to schizophrenia, and positive symptoms are the appearance of new states that were not supposed to exist. Negative symptoms are mainly characterized by a paucity of thought, a clinical observation of a paucity of verbal content, no topics to talk about, emotional indifference, a clinically flat expression, no corresponding emotional ups and downs to changes in the external environment, and behavioral withdrawal. Positive symptoms include hallucinations, such as hearing someone talking to them out of thin air, but not seeing them, or seeing snakes on the ceiling. There are also delusions, such as the belief that you are an important person and that someone is coming to harm you.