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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
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Annals of Occupational and Environmental Medicine

ISSN: 2052-4374

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