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Table 3 Performance on the KCNT between computer familiarity groups by test systems

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

KCNT Type of system Computer familiarity F-value p-value Post-hocb
Group I Group II Group III
Mean (SE)a Mean (SE)a Mean (SE)a
SRT RTmean System 1 265.3 (58.1) 422.7 (30.6) 401.0 (26.9) 4.353 0.017 2 > 1
System 2 222.4 (56.6) 407.7 (29.8) 401.6 (26.2) 6.126 0.004 2 > 1
System 3 341.4 (72.7) 568.0 (38.3) 555.4 (33.7) 5.576 0.006 2 > 1
System 4 333.2 (83.3) 540.1 (43.9) 533.0 (38.6) 3.521 0.035 2 > 1
SDRT System 1 49.1 (35.0) 65.6 (18.4) 79.9 (16.2) 0.231 0.794  
System 2 46.7 (22.9) 78.8 (12.1) 74.2 (10.6) 1.169 0.317  
System 3 51.0 (65.5) 98.5 (34.5) 138.8 (30.3) 0.537 0.587  
System 4 64.7 (130.5) 128.6 (68.8) 133.1 (60.4) 0.135 0.874  
RateCR System 1 0.994 (0.005) 0.997 (0.002) 0.999 (0.002) 0.303 0.739  
System 2 1.000 (0.002) 1.000 (0.001) 1.000 (0.001) 0.032 0.969  
System 3 0.993 (0.005) 0.997 (0.003) 0.999 (0.002) 0.435 0.649  
System 4 0.991 (0.005) 0.999 (0.003) 0.997 (0.002) 1.596 0.210  
CRT RTmean System 1 616.5 (39.4) 592.5 (20.8) 583.7 (18.2) 0.236 0.791  
System 2 645.6 (48.1) 594.5 (25.3) 580.3 (22.3) 0.679 0.511  
System 3 735.0 (42.0) 745.2 (22.1) 756.9 (19.4) 0.085 0.919  
System 4 721.1 (41.0) 679.3 (21.6) 692.6 (19.0) 0.697 0.502  
SDRT System 1 119.7 (16.1) 112.9 (8.5) 79.5 (7.5) 3.160 0.049 2 > 3
System 2 124.5 (25.4) 127.6 (13.4) 89.1 (11.8) 1.698 0.191  
System 3 116.6 (28.5) 135.7 (15.0) 120.4 (13.2) 0.500 0.609  
System 4 101.0 (22.6) 120.6 (11.9) 114.7 (10.5) 0.492 0.614  
RateCR System 1 0.985 (0.007) 0.997 (0.004) 0.994 (0.003) 1.920 0.155  
System 2 0.995 (0.006) 0.998 (0.003) 0.992 (0.003) 0.900 0.411  
System 3 0.995 (0.009) 0.988 (0.005) 0.992 (0.004) 0.403 0.670  
System 4 0.987 (0.004) 0.995 (0.002) 0.999 (0.002) 2.119 0.128  
DA RTmean System 1 2684.4 (248.5) 2803.4 (131.0) 2317.1 (115.1) 3.006 0.056  
System 2 2768.9 (238.0) 2660.4 (125.5) 2344.8 (110.3) 1.349 0.267  
System 3 2644.9 (217.0) 2727.1 (114.4) 2440.9 (100.5) 1.394 0.255  
System 4 2617.7 (265.7) 2703.8 (140.1) 2380.0 (123.1) 1.178 0.314  
SDRT System 1 466.1 (157.4) 593.9 (83.0) 448.7 (72.9) 1.059 0.353  
System 2 565.0 (174.6) 500.2 (92.1) 501.3 (80.9) 0.079 0.925  
System 3 641.2 (141.3) 628.9 (74.5) 465.9 (65.5) 0.966 0.386  
System 4 696.8 (184.7) 638.1 (97.4) 426.3 (85.6) 0.986 0.379  
RateCR System 1 0.645 (0.067) 0.853 (0.036) 0.921 (0.031) 5.830 0.005 1 < (2 = 3)
System 2 0.625 (0.059) 0.791 (0.031) 0.939 (0.027) 8.408 0.001 1 < 2 < 3
System 3 0.680 (0.061) 0.868 (0.032) 0.913 (0.028) 5.544 0.006 1 < (2 = 3)
System 4 0.704 (0.070) 0.857 (0.037) 0.901 (0.033) 2.852 0.065  
SDS RTmean System 1 2328.7 (143.1) 2045.3 (75.4) 1930.0 (66.3) 2.564 0.085  
System 2 2280.2 (111.0) 2006.8 (58.5) 1966.2 (51.4) 3.461 0.037 1 > 2
System 3 2306.9 (120.9) 1984.4 (63.7) 1963.8 (56.0) 4.019 0.022 1 > 2
System 4 2215.2 (129.2) 2021.8 (68.1) 1985.7 (59.8) 1.292 0.282  
SDRT System 1 836.6 (164.4) 521.8 (86.7) 473.7 (76.2) 2.095 0.131  
System 2 635.8 (94.5) 460.4 (49.8) 553.6 (43.8) 2.822 0.067  
System 3 819.3 (135.8) 585.8 (71.6) 589.2 (62.9) 1.681 0.194  
System 4 709.1 (118.7) 558.1 (62.6) 621.3 (55.0) 1.183 0.313  
RateCR System 1 0.979 (0.011) 0.989 (0.006) 0.990 (0.005) 0.466 0.630  
System 2 0.991 (0.010) 0.993 (0.005) 0.984 (0.005) 0.656 0.522  
System 3 0.946 (0.021) 0.968 (0.011) 0.976 (0.010) 0.740 0.481  
System 4 0.962 (0.018) 0.982 (0.009) 0.979 (0.008) 0.791 0.458  
FTS FTSD System 1 69.6 (3.9) 69.7 (2.0) 73.8 (1.8) 0.820 0.445  
System 2 69.3 (3.7) 70.0 (2.0) 74.2 (1.7) 0.913 0.406  
System 3 69.1 (4.3) 71.6 (2.3) 71.5 (2.0) 0.186 0.830  
System 4 68.6 (3.9) 70.9 (2.1) 73.4 (1.8) 0.457 0.635  
FTSND System 1 59.2 (4.0) 64.5 (2.1) 67.2 (1.8) 1.273 0.287  
System 2 58.2 (4.1) 65.1 (2.2) 68.7 (1.9) 2.058 0.136  
System 3 57.0 (4.2) 63.2 (2.2) 64.3 (1.9) 1.279 0.285  
System 4 59.1 (4.1) 67.4 (2.2) 67.2 (1.9) 2.327 0.105  
  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, SE standard error, 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 ANCOVA
  4. aMean and SE are estimates adjusted by age and education as covariates
  5. bThe numbers 1, 2, and 3 represent Group I, Group II, and Group III, respectively. Analyzed by Bonferroni