Schizophrenia
Schizophrenia is a classification.  Schizophrenia is classed by clinical psychiatrists, as a mental and behavioral disorder  a "mental disorder", and a "disease". Schizophrenia is classified as a "primary psychotic disorder". "Schizophrenia" "behavioral" problem is a subject of psychology, the science of behaviour. Usually, it is seen as a field of psychiatry.