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Table 4 Performance on the KCNT between test systems by computer familiarity groups

From: Performance assessment on the Korean Computerized Neurobehavioral Test using a mobile device and a conventional computer: an experimental study

KCNT Computer familiarity Type of system F or χ2 p-value* Post-hoca
System 1 System 2 System 3 System 4
Mean (SD) Mean (SD) Mean (SD) Mean (SD)
SRT RTmean Group I 355.2 (36.8) 320.9 (48.9) 490.2 (28.6) 453.2 (48.2) 60.757 < 0.001 (3 = 4) > 1 > 2
Group II 425.6 (163.5) 415.3 (148.7) 575.1 (203.2) 535.2 (186.2) 59.296 < 0.001 3 > 4 > (1 = 2)
Group III 379.1 (126.4) 375.0 (130.3) 517.9 (179.8) 508.9 (216.7) 87.240 < 0.001 (3 = 4) > (1 = 2)
SDRT Group I 65.6 (41.0) 59.2 (37.1) 92.5 (46.0) 90.8 (40.1) 11.800 0.008 4 > 1
Group II 70.8 (37.7) 79.8 (51.7) 103.5 (70.8) 101.4 (96.3) 15.887 0.001 3 > (2 = 1)
Group III 73.2 (88.6) 70.8 (46.5) 126.6 (170.4) 142.8 (355.4) 16.620 0.001 3 > (1 = 2)
RateCR Group I 0.997 (0.010) 1.000 (0.000) 0.993 (0.014) 0.993 (0.014) 3.000 0.392  
Group II 0.999 (0.007) 1.000 (0.000) 0.997 (0.013) 1.000 (0.000) 2.000 0.572  
Group III 0.998 (0.011) 0.999 (0.005) 0.998 (0.007) 0.996 (0.013) 1.979 0.577  
CRT RTmean Group I 716.2 (111.3) 714.5 (165.7) 862.8 (73.4) 822.3 (121.2) 15.838 0.001 (3 = 4) > (1 = 2)
Group II 633.3 (99.3) 630.0 (104.6) 803.0 (92.0) 725.0 (96.1) 51.470 < 0.001 3 > 4 > (1 = 2)
Group III 537.8 (73.1) 544.3 (81.2) 694.9 (104.6) 643.6 (80.7) 133.278 < 0.001 3 > 4 > (2 = 1)
SDRT Group I 105.1 (50.6) 100.6 (37.1) 114.1 (21.9) 113.9 (51.9) 0.306 0.820  
Group II 111.0 (34.5) 123.6 (77.9) 137.9 (70.2) 129.4 (50.0) 2.374 0.499  
Group III 83.8 (28.5) 96.8 (35.4) 119.7 (55.7) 106.7 (43.6) 22.110 < 0.001 (3 = 4) > 1
RateCR Group I 0.993 (0.015) 0.995 (0.009) 0.991 (0.015) 0.993 (0.010) 0.643 0.887  
Group II 1.000 (0.000) 0.998 (0.006) 0.987 (0.021) 0.997 (0.007) 14.211 0.003 3 < 1
Group III 0.991 (0.017) 0.991 (0.016) 0.993 (0.017) 0.996 (0.010) 3.182 0.364  
DA RTmean Group I 2624.4 (534.6) 2709.1 (490.3) 2715.3 (246.9) 2562.7 (270.8) 0.597 0.623  
Group II 2718.3 (553.1) 2611.4 (525.7) 2738.1 (480.4) 2660.8 (510.7) 5.087 0.166  
Group III 2379.6 (492.1) 2386.4 (461.8) 2418.8 (451.2) 2417.1 (597.4) 3.540 0.316  
SDRT Group I 396.0 (230.1) 507.1 (334.2) 530.3 (326.1) 551.9 (413.2) 0.867 0.833  
Group II 559.9 (384.4) 477.0 (213.9) 580.2 (285.7) 566.5 (319.2) 3.783 0.286  
Group III 484.0 (296.7) 527.7 (418.0) 518.9 (284.3) 500.1 (403.5) 2.190 0.534  
RateCR Group I 0.653 (0.295) 0.688 (0.143) 0.674 (0.298) 0.674 (0.301) 0.067 0.977  
Group II 0.848 (0.117) 0.810 (0.127) 0.886 (0.097) 0.848 (0.133) 7.415 0.060  
Group III 0.922 (0.089) 0.914 (0.115) 0.905 (0.079) 0.913 (0.088) 3.375 0.337  
SDS RTmean Group I 2591.9 (550.5) 2555.1 (307.8) 2647.1 (392.5) 2508.6 (364.8) 1.267 0.737  
Group II 2132.5 (245.0) 2114.5 (220.6) 2112.9 (283.1) 2157.3 (293.3) 2.113 0.549  
Group III 1820.6 (261.6) 1842.4 (242.8) 1813.3 (232.1) 1841.7 (260.1) 0.810 0.847  
SDRT Group I 885.4 (932.6) 691.0 (223.0) 846.0 (362.8) 802.4 (299.2) 3.267 0.352  
Group II 481.8 (133.3) 491.7 (136.5) 587.7 (146.2) 616.7 (275.4) 4.604 0.014 3 > 1
Group III 485.7 (166.8) 523.1 (213.9) 582.1 (310.2) 566.6 (216.3) 4.950 0.175  
RateCR Group I 0.985 (0.024) 0.988 (0.020) 0.957 (0.028) 0.960 (0.065) 9.182 0.027 b
Group II 0.993 (0.024) 0.993 (0.015) 0.975 (0.041) 0.982 (0.033) 6.843 0.077  
Group III 0.987 (0.023) 0.985 (0.023) 0.969 (0.045) 0.980 (0.028) 4.727 0.193  
FTS FTSD Group I 67.7 (10.1) 66.9 (8.4) 65.6 (7.8) 66.9 (9.3) 0.982 0.373  
Group II 68.7 (6.3) 68.9 (6.3) 69.0 (9.1) 70.0 (6.7) 0.704 0.474  
Group III 74.9 (8.2) 75.4 (8.1) 73.8 (9.5) 74.3 (8.3) 1.216 0.302  
FTSND Group I 57.6 (7.2) 57.6 (7.4) 55.2 (10.2) 57.2 (8.4) 1.418 0.262  
Group II 63.1 (7.0) 64.4 (7.1) 61.2 (8.4) 66.2 (7.4) 14.175 < 0.001 3 < (2 = 4) and (3 = 1) < 4
Group III 68.4 (8.9) 69.2 (9.2) 65.9 (8.7) 68.2 (9.0) 18.223 < 0.001 3 < (1 = 2)
  1. System 1 a desktop computer equipped with a conventional 106-key keyboard, System 2 a desktop computer equipped with a simplified 17-key keyboard, System 3 a tablet PC with an on-screen keyboard, System 4 a tablet PC equipped with a simplified 17-key keyboard, SD standard deviation, SRT simple reaction time, CRT choice reaction time, DA digit addition, SDS symbol-digit substitution, FTS finger tapping speed, RTmean mean reaction time, SDRT standard deviation of reaction time, RateCR correct response rate, FTSD finger tapping speed of dominant hand, FTSND finger tapping speed of non-dominant hand, Group I participants with typing speed of near zero (no competency using computers), Group II participants with typing speed less than 200 characters/min (relatively familiar with computers), Group III participants with typing speed of 200 characters/min or greater (very familiar with computers)
  2. RTmean and SDRT are in millisecond (ms); FTSD and FTSND are in average number of taps per 10 s
  3. *Calculated by repeated measures ANOVA or Friedman test
  4. aThe numbers 1, 2, 3, and 4 represent Systems 1, 2, 3, and 4, respectively. Analyzed by Bonferroni or Wilcoxon signed-rank test
  5. bNot statistically significant in post-hoc analysis