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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
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Annals of Occupational and Environmental Medicine

ISSN: 2052-4374

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