Evolving the meaning of hallucinations and delusions Psychology Today: Awais Aftab, clinical professor of psychiatry at the School of Medicine, said the understanding of hallucinations and delusions has evolved and radically shifted in psychiatry over the past century. “While they are associated in the popular imagination with schizophrenia, they occur across a wide range of psychiatric disorders, including mood episodes such as mania and depression, postpartum psychosis, substance-induced psychosis, brief psychotic disorder, delirium,” he said. |