Screening and assessing ideas and delusions of reference using a semi-structured interview scale: A validation study of the Ideas of Reference Interview Scale (IRIS) in early psychosis patients

IRIS provided a reliable high-resolution tool for progressing single-symptom research into IOR/DOR, a potential target feature of schizophrenia. The scale allows future investigation into self-referential processing and detailed phenomenological comparison in different clinical, subclinical, and healthy populations.