Table 2 Comparison of eye tracking metrices between MS and HC groups
MS (n = 33); mean (SD), n (%) | HC (n = 25); mean (SD), n (%) | t-test/x2 | p-value | Cohen’s d | |
|---|---|---|---|---|---|
Total number of fixations in the test area | 129.26 (38.41) | 110.00 (33.53) | t = −2.054 | p = 0.045 | 0.534 |
Total number of fixations in the key area | 161.13 (55.98) | 163.52 (46.56) | t = 0.167 | p = 0.868 | 0.046 |
Mean fixation time in the test area (ms) | 182.97 (66.98) | 182.17 (30.16) | t = −0.053 | p = 0.958 | 0.015 |
Mean fixation time in the key area (ms) | 154.29 (21.09) | 160.78 (33.81) | t = 0.867 | p = 0.390 | 0.230 |
Total number of visits to the key area | 44.71 (11.69) | 40.48 (8.72) | t = −1.460 | p = 0.150 | 0.410 |
Number of visits to key area per response | 1.19 (0.53) | 0.88 (0.24) | t = −2.545 | p = 0.014 | 0.753 |
Average number of fixations in the key area per visit | 3.73 (0.80) | 4.04 (1.05) | t = 1.251 | p = 0.216 | 0.332 |
Average number of fixations in the test area per visit | 3.00 (0.54) | 2.82 (1.30) | t = −0.672 | p = 0.504 | 0.181 |
Average time spent in the key area per visit (ms) | 556.71 (143.17) | 626.21 (119.69) | t = 1.899 | p = 0.063 | 0.526 |
Average time spent in the test area per visit (ms) | 523.96 (129.93) | 460.24 (122.74) | t = −1.836 | p = 0.072 | 0.504 |
Mean saccade velocity, total (degrees/ms) | 0.066 (0.017) | 0.064 (0.011) | t = −0.422 | p = 0.649 | 0.128 |
Mean saccade distance, total (degrees) | 4.73 (0.71) | 4.99 (0.96) | t = 1.18 | p = 0.265 | 0.288 |
Mean saccade distance in the key area (degrees) | 2.89 (0.40) | 3.36 (0.80) | t = 2.83 | p = 0.007 | 0.733 |
Mean saccade distance in the test area (degrees) | 2.73 (0.63) | 2.68 (0.77) | t = −0.32 | p = 0.751 | 0.086 |
Mean saccade velocity in the key area (degrees/ms) | 0.024 (0.001) | 0.026 (0.001) | t = 0.876 | p = 0.385 | 0.244 |
Mean saccade velocity in the test area (degrees/ms) | 0.027 (0.01) | 0.025 (0.001) | t = −0.824 | p = 0.414 | 0.229 |