Table 3 Descriptive statistics and analysis of variance (ANOVA) for NASA-TLX total scores

Game: Simple

0.3

0.601

^{n =43}

130.5

< 0.001

comparison:

p-value:

effect size:

3.1

0.079

^{n =35}

51.5

< 0.001

comparison:

p-value:

effect size:

 Level 1

9.5 (19.0)

Level 1 vs. 2

< 0.001

0.909

37.5 (29.0)

Level 1 vs. 2

< 0.001

0.823

 Level 2

16.0 (24.0)

Level 1 vs. 3

< 0.001

1.187

44.5 (35.0)

Level 1 vs. 3

< 0.001

1.164

 Level 3

27.5 (26.5)

Level 2 vs. 3

< 0.001

1.133

57.5 (33.5)

Level 2 vs. 3

< 0.001

1.006

Game: Targets

10.3

0.001

^{n =42}

132.0

< 0.001

comparison:

p-value:

effect size:

6.3

0.012

^{n =34}

89.4

< 0.001

comparison:

p-value:

effect size:

 Level 1

12.0 (21.0)

Level 1 vs. 2

< 0.001

1.168

30.0 (26.5)

Level 1 vs. 2

< 0.001

1.128

 Level 2

29.0 (26.3)

Level 1 vs. 3

< 0.001

1.227

48.5 (28.5)

Level 1 vs. 3

< 0.001

1.229

 Level 3

45.0 (31.8)

Level 2 vs. 3

< 0.001

1.194

64.0 (30.5)

Level 2 vs. 3

< 0.001

1.174

Game: Tetris

4.9

0.028

^{n =42}

76.8

< 0.001

comparison:

p-value:

effect size:

16.3

< 0.001

^{n =34}

56.0

< 0.001

comparison:

p-value:

effect size:

 Level 1

19.0 (23.5)

Level 1 vs. 2

< 0.001

0.906

33.0 (29.3)

Level 1 vs. 2

< 0.001

0.994

 Level 2

28.5 (40.3)

Level 1 vs. 3

< 0.001

1.189

45.0 (33.5)

Level 1 vs. 3

< 0.001

1.163

 Level 3

58.5 (49.5)

Level 2 vs. 3

< 0.001

1.181

60.5 (32.3)

Level 2 vs. 3

< 0.001

0.917

Game: Simon

9.2

0.002

^{n =41}

132.0

< 0.001

comparison:

p-value:

effect size:

12.2

< 0.001

^{n =33}

68.4

< 0.001

comparison:

p-value:

effect size:

 Level 1

15.0 (25.0)

Level 1 vs. 2

< 0.001

1.151

44.0 (36.0)

Level 1 vs. 2

< 0.001

0.910

 Level 2

32.0 (32.5)

Level 1 vs. 3

< 0.001

1.227

52.0 (35.8)

Level 1 vs. 3

< 0.001

1.201

 Level 3

60.0 (41.3)

Level 2 vs. 3

< 0.001

1.201

70.0 (32.5)

Level 2 vs. 3

< 0.001

1.162

Game: Habitats

0.0

0.936

^{n =42}

4.9

0.013

comparison:

p-value:

effect size:

8.0

0.005

^{n =35}

12.8

< 0.001

comparison:

p-value:

effect size:

 Level 1

13.0 (25.0)

Level 1 vs. 2

< 0.001

0.513

31.0 (34.5)

Level 1 vs. 2

0.058

0.320

 Level 2

16.5 (28.0)

Level 1 vs. 3

< 0.001

0.515

32.0 (37.0)

Level 1 vs. 3

< 0.001

0.813

 Level 3

16.0 (31.3)

Level 2 vs. 3

0.218

0.190

36.5 (31.0)

Level 2 vs. 3

0.003

0.491