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. 2021 Jun 19;144(11):3436–3450. doi: 10.1093/brain/awab230

Table 5.

Path length and duration group averages for the different attentional manipulation conditions, and statistical analyses

Direct versus indirect visual feedback
 Absent visual feedback versus baselinea
 Accuracy versus baselineb
 Slow/Fast versus baselinea
 Beyond the movement versus baselinea
 To the start versus baselinea
n Direct Indirect n Absent Baseline n Accuracy Baseline n Slow Baseline Fast n Beyond Baseline n Start Baseline
Functional tremor
Path length 17

  • 777 (30.4)

  • [766]

  • 808 (105.6)

  • [778]

 22

  • 787 (55.6)

  • [774]

  • 798 (93.3)

  • [776]

 17

  • 780 (38.8)

  • [768]

  • 777 (30.4)

  • [766]

 19

  • 830 (118.5)

  • [795]

  • 805 (99.9)

  • [778]

  • 777 (52.7)

  • [765]

 19

  • 818 (9.9)

  • [819]

  • 828 (24.9)

  • [822]

 19

  • 822 (23.9)

  • [816]

  • 850 (119.4)

  • [820]

  • Z = 2.53,

  • P = 0.011, r = 0.61

  • CI: 8.9, 25.2

  • Z = −2.35,

  • P = 0.019 , r = −0.50

  • CI: 1.0, 7.6

  • Z = 2.06,

  • P = 0.040, r = 0.50

  • CI: 0.4, 7.6

  • Z = 3.06,

  • P = 0.002, r = 0.70

  • CI: 9.0, 41.9

  • Z = −3.7,

  • P = 0.0002, r = −0.85

  • CI: 12.0, 23.7

  • Z = −2.13,

  • P = 0.033, r = −0.49

  • CI: 0.7, 15.2

  • Z = −2.5,

  • P = 0.013, r = −0.57

  • CI: 1.5, 11.3
Duration

  • 1605 (897)

  • [1513]

  • 3204 (1433)

  • [3005]

  • 3362 (2280)

  • [2374]

  • 3239 (1778)

  • [3213]

  • 3201 (3019)

  • [2168]

  • 1605 (897)

  • [1513]

  • 12188 (7695)

  • [8205]

  • 3240 (1403)

  • [3005]

  • 1475 (1100)

  • [1187]

  • 3072 (1348)

  • [3105]

  • 3820 (1497)

  • [3316]

  • 2388 (1461)

  • [1955]

  • 3668 (1483)

  • [3092]

  • t(16) = 5.11,

  • P = 0.0001, d = 1.24

  • CI: 936, 2262

  • Z = −0.34,

  • P = 0.73, r = −0.07

  • CI: −611, 707

  • Z = 2.91,

  • P = 0.0036, r = 0.71

  • CI: 378, 2513

  • Z = 3.82,

  • P = 0.0001, r = 0.88

  • CI: 5429, 10864

  • Z = −3.1,

  • P = 0.0019, r = 0.71

  • CI: 1021, 2670

  • t(18) = −2.81,

  • P = 0.012, d = −0.65

  • CI: 189, 1307

  • Z = −2.74,

  • P = 0.006, r = −0.63

  • CI: 499, 2248
Organic tremor
Path length 19

  • 764 (7.5)

  • [764]

  • 779 (4.1)

  • [773]

 18

  • 769 (7.0)

  • [768]

  • 773 (5.4)

  • [772]

 19

  • 770 (9.0)

  • [767]

  • 764 (7.5)

  • [764]

 20

  • 828 (95.4)

  • [795]

  • 778 (17.3)

  • [773]

  • 766 (7.7)

  • [766]

 20

  • 819 (14.4)

  • [817]

  • 824 (23.8)

  • [819]

 20

  • 825 (22.6)

  • [820]

  • 823 (23.9)

  • [818]

  • Z = 3.82,

  • P = 0.0001, r = 0.88

  • CI: 8.9, 16.3

  • t(17) = −3.56,

  • P = 0.002, d = −0.84

  • CI: 1.6, 6.1

  • Z = 3.30,

  • P = 0.001, r = 0.76

  • CI: 2.5, 8.2

  • Z = 3.92,

  • P = 0.0001, r = 0.88

  • CI: 16.6, 74.8

  • Z = −3.58,

  • P = 0.0003, r = −0.80

  • CI: 5.9, 13.0

  • Z = −1.64,

  • P = 0.10, r = −0.37

  • CI: −0.6, 6.3

  • Z = 0.71,

  • P = 0.48, r = 0.16

  • CI: −4.9, 3.7
Duration

  • 1031 (506)

  • [798]

  • 2593 (1302)

  • [2283]

  • 2362 (2291)

  • [1814]

  • 2108 (1169)

  • [1676]

  • 2385 (2037)

  • [1863]

  • 1031 (506)

  • [798]

  • 11765 (7026)

  • [9546]

  • 2572 (1271)

  • [2257]

  • 1178 (564)

  • [966]

  • 2398 (695)

  • [2229]

  • 3232 (1196)

  • [2857]

  • 2599 (1120)

  • [2167]

  • 3189 (1208)

  • [2822]

  • Z = 3.82,

  • P = 0.0001, r = 0.88

  • CI: 1027, 1895

  • Z = −0.07,

  • P = 0.95, r = −0.02

  • CI: −538, 479

  • Z = 3.70,

  • P = 0.0002, r = 0.85

  • CI: 400, 1946

  • Z = 3.92,

  • P = 0.0001, r = 0.88

  • CI: 5554, 12256

  • Z = −3.88,

  • P = 0.0001, r = −0.87

  • CI: 717, 1829

  • Z = −3.77,

  • P = 0.0002, r = −0.84

  • CI: 473, 1081

  • Z = −2.61,

  • P = 0.009, r = −0.58

  • CI: 122, 1005
Healthy controls
Path length 20

  • 761 (4.1)

  • [762]

  • 770 (5.2)

  • [770]

 23

  • 765 (7.7)

  • [765]

  • 768 (5.7)

  • [769]

 20

  • 765 (6.6)

  • [765]

  • 761 (4.1)

  • [762]

 19

  • 794 (13.4)

  • [791]

  • 770 (5.3)

  • [771]

  • 760 (4.9)

  • [762]

 23

  • 815 (9.4)

  • [813]

  • 813 (7.9)

  • [811]

 23

  • 817 (15.6)

  • [813]

  • 813 (7.9)

  • [811]

  • t(19) = 8.61,

  • P < 0.0001, d = 1.93

  • CI: 6.8, 11.1

  • t(22) = −2.29,

  • P = 0.032, d = −0.48

  • CI: 0.3, 5.0

  • t(19)=3.09,

  • P = 0.006, d = 0.69

  • CI: 1.0, 5.4

  • t(18) = 7.74,

  • P < 0.0001, d =1.78

  • CI: 17.5, 30.5

  • Z = −3.78,

  • P = 0.0002, r = −0.87

  • CI: 7.7, 13.3

  • Z = 0.46,

  • P = 0.65, r = 0.10

  • CI: −4.3, 2.1

  • Z = 0.91,

  • P = 0.36, r = 0.19

  • CI: −6.2, 1.8
Duration

  • 1085 (711)

  • [1088]

  • 2679 (2246)

  • [2120]

  • 2082 (2698)

  • [1362]

  • 2121 (2030)

  • [1398]

  • 2221 (2132)

  • [1609]

  • 1085 (711)

  • [1088]

  • 14636 (6528)

  • [14 718]

  • 2693 (2307)

  • [2044]

  • 902 (229)

  • [945]

  • 2179 (523)

  • [2134]

  • 2845 (1142)

  • [2851]

  • 2374 (619)

  • [2389]

  • 2845 (1142)

  • [2851]

  • Z = 3.88,

  • P = 0.0001, r = 0.87

  • CI: 783, 2110

  • Z = −0.55,

  • P = 0.58, r = −0.11

  • CI: −253, 499

  • Z = 3.47,

  • P = 0.0005, r = 0.78

  • CI: 357, 1524

  • Z = 3.82,

  • P = 0.0001, r = 0.88

  • CI: 9061, 14 031

  • Z = −3.7,

  • P = 0.0002, r = −0.85

  • CI: 743, 2182

  • Z = −3.22,

  • P = 0.0013, r = −0.67

  • CI: 214, 921

  • Z = −2.59,

  • P = 0.01, r = −0.54

  • CI: 98, 741

The mean, standard deviation and median path lengths (in pixels) and durations (in milliseconds) are given for each group and condition, in addition to the pairwise comparisons between the two conditions (paired t-test or Wilcoxon signed-rank test) and the 95% CI of each comparison’s effect size (95% CI for the difference in means, or medians in case of non-normal distributions). Values are presented as mean (SD) [median] followed below by t-test/signed-rank test and effect size 95% CI. Statistically significant results are highlighted in bold. n = number of participants.

a

Both conditions performed with indirect visual feedback.

b

Both conditions performed with direct visual feedback.