Table 4 Attentional and visuoperceptual task comparisons (day 0 vs day 5)

Active n = 19 Placebo n = 17
Day 0 Day 5 Day 0 Day 5
Mean SD Mean SD Mean SD Mean SD
SRT: correct answers (%)a 94.51 6.87 91.76 14.34 89.05 15.49 85.48 22.29
SRT: mean RT (ms), correct answersb 542.36 213.12 501.36 182.91 760.89 535.01 593.98 185.55
SRT: coefficient of variation (%)a 51.99 30.36 52.17 31.54 80.83 41.47 74.17 51.63
CRT: correct answers (%)c 79.26 23.11 81.85 26.82 69.11 34.19 79.33 22.75
CRT: mean RT (ms), correct answersd 863.29 333.03 808.24 218.21 946.87 260.95 1059.19 576.05
CRT: coefficient of variation (%)e 56.86 35.59 44.83 29.18 46.68 27.93 56.56 40.12
DV: correct answers (%)f 65.45 24.11 63.37 24.73 59.07 24.92 60.37 21.76
DV: mean RT (ms), correct answersg 676.68 97.96 675.88 135.74 683.95 96.12 661.17 125.49
DV: coefficient of variation (%)h 29.90 12.23 29.77 14.08 32.21 14.56 41.27 18.68
Angle: correct answers (%)i 72.92 21.84 74.17 15.23 70.83 19.23 70.00 14.56
Angle: difficulty (degrees)i 41.34 31.79 39.89 30.47 48.48 34.65 47.87 30.83
Motion: correct answers (%)j 53.81 17.97 55.95 16.29 55.28 15.86 56.11 10.72
Motion: difficulty (relative speed)j 3.57 0.89 3.49 0.97 3.66 0.71 3.91 0.12
1. SD standard deviation, SRT simple reaction time, RT reaction time, CRT choice reaction time, DV digit vigilance
2. aActive n = 17, placebo n = 14 (due to incomplete data or removal of RT > 2SD)
3. bActive n = 15, placebo n = 12 (due to incomplete data or removal of RT > 2SD)
4. cActive n = 18, placebo n = 15 (due to incomplete data or removal of RT > 2SD)
5. dActive n = 16, placebo n = 11 (due to incomplete data or removal of RT > 2SD)
6. eActive n = 18, placebo n = 13 (due to incomplete data or removal of RT > 2SD)
7. fActive n = 16, placebo n = 15 (due to incomplete data or removal of RT > 2SD)
8. gActive n = 15, placebo n = 10 (due to incomplete data or removal of RT > 2SD)
9. hActive n = 16, placebo n = 13 (due to incomplete data or removal of RT > 2SD)
10. iActive n = 16, placebo n = 12 (due to incomplete data or removal of RT > 2SD)
11. jActive n = 14, placebo n = 12 (due to incomplete data or removal of RT > 2SD)