Clinical Research Directory

Inclusion Criteria: * current experience of auditory hallucinations that appear at least once a week (measured over the PSYRATS). * diagnosis of a schizophrenia-spectrum disorder according to the Diagnostical and Statistical Manual (5th edition) and/or the International Statistical Classification of Diseases and Related Health Problems (ICD-10), code F2x.x. In case of a suspected diagnosis or missing clinical diagnostic, we will apply the Mini-International Neuropsychiatric Interview (M.I.N.I.). * stable psychiatric medication over at least one month, slight changes of dosage are allowed and will be evaluated by a trained psychiatrist. * ability to give informed consent. * willingness and ability to engage in the psychotherapeutic self-help intervention. * availability of a mobile device and internet access. Exclusion Criteria: * neurological disorders that may affect cognitive functioning and condition after severe traumatic brain injury. * acute suicidality, assessed at the previous screening procedures. * auditory hallucinations in the context of other primary diagnoses e.g., post-traumatic stress disorder or borderline personality disorder. * acute substance abuse other than nicotine and prescribed medication. * current electroconvulsive therapy. * current inpatient or day-care treatment.