The term psychosis is used to refer to a severe form of mental illness which may include characteristic symptoms such as hallucination, delusions, and both thought and behavioral abnormalities. Diagnostically, psychosis is a primary aspect of psychiatric disorders including Schizophrenia and Delusional Disorder. Psychosis may result from various etiologies.
Encyclopedia of Evolutionary Psychological Science
(2019). Psychosis. Encyclopedia of Evolutionary Psychological Science.
Available at: https://nsuworks.nova.edu/cps_facbooks/591