Positive and Negative Syndrome Scale (PANSS) is an interview-based assessment of the severity of symptoms associated with schizophrenia, including positive, negative, and general psychopathology. Scale of Assessment for Positive Symptoms (SAPS) is an interview-based scale of positive symptoms of schizophrenia. SAPS consists of four areas: hallucinations, delusions, bizarre behaviour and positive formal thought disorder. Each area includes ratings of specific symptoms and a global rating. The Psychotic Symptom Rating Scale (PSYRATS) is a 17-item semi-structured interview measuring the severity of multiple dimensions of auditory hallucinations and delusions, including conviction and duration.

Calgary Depression Scale (CDS) is a nine-item structured interview scale that assesses depressive symptoms in patients with schizophrenia.

BAVQ-R is a self-report questionnaire that consists of three subscales pertaining to beliefs about voices: malevolence (i.e. voices as evil and persecutory), benevolence (i.e. voices as helpful), and omnipotence (i.e. voices as controlling and powerful).

BAI is a self-report questionnaire that measures anxiety severity and unique symptom features that are independent of that in depression, including somatic symptoms and subjective experience of panic and anxiety.

An instrument developed to assess cognitive ability and the relationship between intellectual functioning and memory of adults. The WAIS-IV (HK) short form includes four subscales - arithmetic, visual puzzle, information, and coding.