Hallucinations - experience or perceptions, such as sight or sound, which are not present in reality.
Anhedonia - occurs when a person does not gain any pleasure from normally enjoyable activities
Disorganised behaviours - occurs when patients are unable to organise their behaviour or are unable to perform everyday routine tasks
Catatonia - refers to impaired or abnormal motor movements, such as repeated gestures, unusual hand or arm actions or waving of arms and legs
Inappropriate affect - symptoms refer to showing inappropriate emotional response, for instance laughing at a funeral