Basic symptoms of schizophrenia are subjective symptoms, described as experienced from a person's perspective, which show evidence of underlying psychopathology. Basic symptoms have generally been applied to the assessment of people who may be at risk to develop psychosis. Though basic symptoms are often disturbing for the person, problems generally do not become evident to others until the person is no longer able to cope with their basic symptoms. In the prodrome to psychosis, uncharacteristic basic symptoms develop first, followed by more characteristic basic symptoms and brief and self-limited psychotic-like symptoms, and finally the onset of psychosis. In 2015, the European Psychiatric Association issued guidance recommending the use of a subscale of basic symptoms, called the Cogniti