EEG-based Neurofeedback for Auditory Verbal Hallucinations (HALFEED)

Inclusion Criteria: * Are ≥ 18 years old * Have a clinical diagnosis of a schizophrenia-spectrum disorder * Have been experiencing auditory verbal hallucinations for at least one year * Score 2 or more on the frequency item of the auditory hallucinations subscale of the Psychotic Symptom Ratings Scale (PSYRATS-AH; Haddock et al., 1999) at time of initial assessment (representing voices occurring at least once a day) * Are deemed refractory to antipsychotic treatment (defined as still hearing voices despite 4-6 weeks of treatment with two different antipsychotics) * Have been on a stable dose of antipsychotic medication for the three months prior to study enrolment * Are right-handed, as determined by the Edinburgh Handedness Inventory (Oldfield, 1971) * Are able to provide written, informed consent. Exclusion Criteria: * Having a diagnosed substance abuse disorder * Prior head injury with loss of consciousness for more than five minutes * At immediate risk of harm to self or others.