4 sessions of Metacognitive Training using 4 treatment modules each targeting different cognitive biases

IPSAQ consists of hypothetical scenarios. Participants are required to think of a single, most likely causal explanation to each of the hypothesized situations, and then to categorize this cause as being internal, external-personal or external-situational.

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.

Beck Depression Inventory - II (BDI-II) is a 21-item self-report inventory that assesses symptoms of depression. Scores can range from 0 to 63, with higher scores reflecting greater symptom severity. Calgary Depression Scale (CDS) is a nine-item structured interview scale that assesses depressive symptoms in patients with schizophrenia.

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.

Maudsley Assessment of Delusions Schedule (MADS) is a standardised interview assessment that records whether participants could consider possibility of being mistaken (PM) about their delusional experience, any possible alternative explanations for the experience (EoE), and their reaction to hypothetical contradiction (RTHC). BADE task is an experimental design for measuring participants' bias against disconfirmatory evidence.

Three subtest short form - vocabulary, matrix reasoning and information - will be administered at baseline to assess the participants' cognitive capacity.