The original 1961 scale consists of 21 items, including symptoms and attitudes whose intensity ratings vary from 0 to 3.
La escala original de 1961 consiste de 21 ítems, que incluyen síntomas y actitudes cuya intensidad varía de 0 a 3.
A escala original de 1961 consiste de 21 itens, que incluem sintomas e atitudes cuja intensidade varia de 0 a 3.