As a scale, it is a type of ordered-metric scaling that yields a scale with internal reliability, and scale-points in excess of the number of initial anchors, more than would be the case with the Likert scale, though not as many as are achieved by the Analog scale. In Louis Thurstone's tradition, it is scored by paired-comparisons.
Ordered-metric scaling, which yields a scale with internal reliability, is a type of scale that has more than the number of initial anchors, but fewer than those found in an Analog scale. It is scored using paired comparisons, following Louis Thurstone's tradition.