Question introduced by Cleve Backster and used in most forms of the ZCT as well as other types of tests. The sacrifice relevant is a question that asks the examinee if he intends to answer truthfully to every question related to the relevant issue. Its putative role is to dissipate the responses of innocent persons who frequently react to the first relevant question. The sacrifice relevant question is not numerically scored. Its value has been disputed in independent research. See: Capps, (1991); Horvath (1994).