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Table 2 Comparison of eye tracking metrices between MS and HC groups

From: Cognitive mediated eye movements during the SDMT reveal the challenges with processing speed faced by people with MS

 MS (n = 33); mean (SD), n (%)HC (n = 25); mean (SD), n (%)t-test/x2p-valueCohen’s d
Total number of fixations in the test area129.26 (38.41)110.00 (33.53)t = −2.054p = 0.0450.534
Total number of fixations in the key area161.13 (55.98)163.52 (46.56)t = 0.167p = 0.8680.046
Mean fixation time in the test area (ms)182.97 (66.98)182.17 (30.16)t = −0.053p = 0.9580.015
Mean fixation time in the key area (ms)154.29 (21.09)160.78 (33.81)t = 0.867p = 0.3900.230
Total number of visits to the key area44.71 (11.69)40.48 (8.72)t = −1.460p = 0.1500.410
Number of visits to key area per response1.19 (0.53)0.88 (0.24)t = −2.545p = 0.0140.753
Average number of fixations in the key area per visit3.73 (0.80)4.04 (1.05)t = 1.251p = 0.2160.332
Average number of fixations in the test area per visit3.00 (0.54)2.82 (1.30)t = −0.672p = 0.5040.181
Average time spent in the key area per visit (ms)556.71 (143.17)626.21 (119.69)t = 1.899p = 0.0630.526
Average time spent in the test area per visit (ms)523.96 (129.93)460.24 (122.74)t = −1.836p = 0.0720.504
Mean saccade velocity, total (degrees/ms)0.066 (0.017)0.064 (0.011)t = −0.422p = 0.6490.128
Mean saccade distance, total (degrees)4.73 (0.71)4.99 (0.96)t = 1.18p = 0.2650.288
Mean saccade distance in the key area (degrees)2.89 (0.40)3.36 (0.80)t = 2.83p = 0.0070.733
Mean saccade distance in the test area (degrees)2.73 (0.63)2.68 (0.77)t = −0.32p = 0.7510.086
Mean saccade velocity in the key area (degrees/ms)0.024 (0.001)0.026 (0.001)t = 0.876p = 0.3850.244
Mean saccade velocity in the test area (degrees/ms)0.027 (0.01)0.025 (0.001)t = −0.824p = 0.4140.229
  1. Abbreviations: MS Multiple Sclerosis, HC Healthy Controls