“…(a) scales with a finite number n of categories [20], (b) scales with infinite number of categories, e.g., in the range from 0 to 1, from −1 to 1, from −10 to 10 [16,14,13]; (c) 2-point scale (n = 2) [31] or multipoint scale (n > 2); (d) scales with a neutral category [20] or without neutral category [10]; (e) scales with verbal labels only at poles [23] or fully labeled when all response categories are explicitly labeled [20,38]; (f) scales with symbolic labels of poles [24]; − 37 − (g) scales with numeric scores explicitly given [20] or not, e.g., given graphically with intervals [23]; (h) scales with positive numeric scores, e.g., 1, …, 5, or from 0 to 1 [20,16] or with both negative and positive scores, e.g., from −1 to 1 [14,9]; (i) scales without polarity of verbal labels; e.g., one of the Likert rating scales [20] contains responses: grade school, junior high school, high school, college, graduate and professional school with the scores 1, 2, 3, 4, 5 typical for bipolar scales; (j) scales with polarity of verbal categories, but without symmetry with respect to the neutral category, i.e., when some positive verbal category or concept has no corresponding opposite negative verbal category [9,26]; (k) scales explicitly using negation operation [40,16,39] or not [20]; (l) scales with non-numeric scores, e.g., with fuzzy sets [40,16]; (m) scales with verbal categories ordered from negative categories on the left to positive categories on the right, or in reverse order [20]; (n) scales with numeric scores increased from left to right: 1, …, 5 or in reverse order: 5, …, 1 [20]; (o) scales with scoring function being linear [20] or nonlinear [34,39] with respect to the indexes of the categories; (p) scales with several verbal labels or concepts assigned to one gradation of the scale, due to synonymy ...…”