Schizophrenia is the most common illnesses with auditory hallucinations. 

Schizophrenia is a chronic brain disorder that affects less than one percent of the Australian population. 

When schizophrenia is active, symptoms can include delusions, hallucinations, disorganized speech, trouble with thinking and lack of motivation. 

Research has shown that schizophrenia affects men and women equally but may have an earlier onset in males.

While there is no cure for schizophrenia, research is leading to innovative and safer treatments.

Delusions: These are false beliefs that are not based in reality. 

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): Disorganized thinking is inferred from disorganized speech. Effective communication can be impaired, and answers to questions may be partially or completely unrelated. 

Disorganized or abnormal motor behaviour: This can be observed as childlike silliness to unpredictable agitation. Behaviour can include resistance to instructions, inappropriate or bizarre posture, a complete lack of response, or useless and excessive movement.

Negative symptoms: This refers to reduced or lack of ability to function normally. Also, the person may lose interest in everyday activities, socially withdraw or lack the ability to experience pleasure.