Histrionic personality disorder stems from Etruscan which means "an actor". Hysteria can be described as an exaggerated or uncontrollable emotion that people, especially in groups, experience. Beliefs about hysteria have varied throughout time. It wasn’t until Sigmund Freud who studied histrionic personality disorder in a psychological manner. “The roots of histrionic personality can be traced to cases of hysterical neurosis described by Freud.” He developed the psychoanalytic theory in the late 19th century and the results from his development led to split concepts of hysteria. One concept labeled as hysterical neurosis (also known as conversion disorder) and the other concept labeled as hysterical character (currently known as histrionic personality disorder). These two concepts must not be confused with each other, as they are two separate and different ideas.