What are the five symptom domains in schizophrenia?
Positive symptoms, negative symptoms, disorganisation, neurocognitive impairment, affective features
What are the positive symptoms in schizophrenia?
Delusions and hallucinations
Are positive symptoms required for a diagnosis of schizophrenia?
Yes
Are positive symptoms always accompanied by impaired insight?
Yes
What are delusions in schizophrenia?
False beliefs that cannot be shaken by logic or reason
What are the usual contents of delusions in schizophrenia?
Persecutory, grandiose, or pseudoscientific
What are hallucinations in schizophrenia?
Experiencing things that are not there, such as hearing voices
What percentage of psychotic patients experience hallucinations?
75%
What is the most common type of hallucination in schizophrenia?
Hearing voices
What might hallucinations in other sensory modalities suggest?
Delirium, dementia, or substance-induced psychosis
What were certain positive symptoms previously considered pathognomonic of schizophrenia?
Kurt Schneider's 'first rank' symptoms
What are 'passivity phenomena' in schizophrenia?
Experiences of one's thoughts, actions, or feelings being controlled by external forces