“…A wide range of measurement tools have been used to quantify comfort, including simple dichotomous responses [11,12,29,94], ranking footwear conditions in order of preference [14, 31-33, 36, 47, 48, 52, 60, 63-65, 76, 77, 79, 81], 4-point [42,80], 5-point [37,40,45,58,70,76,97], 6-point [59], 7-point [47,64,79,87], 9-point [57] and 12-point [41] Likert scales, 10-point numerical rating scales [43,78], and 100 mm [15, 16, 18-21, 27, 28, 30, 35, 39, 48, 49, 53, 56, 63-65, 67, 68, 71, 73, 74, 77, 79, 82, 85, 89, 90, 93, 99, 104, 105], 150 mm [22,25,26,36,46,50,55,61,62,66,69,75,83,84,98,100] and 170 mm [44] visual analog scales. The anchor statements indicating the lowest possible comfort score included 'not comfortable at all' [19-22, 25, 26, 30, 39, 49, 50, 53, 55, 56, 61-65, 73, 79, 82-85, 89, 93], 'very uncomfortable' [27,…”