Table 2 Scores of the NASA-TLX workload measurement (median and interquartile ranges of the parameter). [ M (Q1, Q3)]

Mental demand

5 (3.25,5.75)

6 (4.5,7.75)

0.218

4 (3,6.5)

5 (3.25,9)

0.315

–

Physical demand

7 (6,7)

8 (5.25,8.75)

0.280

5 (4,5.75)

5 (4,5)

0.971

–

Temporal demand

5 (4.25,6.75)

6 (4,7)

1.000

3 (2.25,5.75)

5 (4,5)

0.393

–

Performance

2 (2,3)

4 (2,5)

0.063

3 (2.25,5)

4 (3,6.75)

0.393

–

Effort

3 (2.25,4)

5 (3,6.75)

0.063

2 (2,4.75)

3 (2,5.75)

0.436

–

Frustration

1 (1,2.5)

1 (1,2.75)

0.631

1 (1,4.5)

1 (1,4.5)

1.000

–

Total

28 (24.25,38.75)

31 (25.75,36)

0.971

25 (19.75,25)

27 (25,28.75)

0.105

–

29 (24.75,36)

–

25 (21.5,28)

–

0.026