Table 3.

Face validity (simulator and exercises).

Questions	Group 1 Novice (n = 15)	Group 2 Intermediate (n = 14)	Group 3 Expert (n = 13)	Mean (n = 42)
Simulator in general
What do you think of the realism of the next issues? (1 = very unrealistic…5 = very realistic)
Simulator itself (hardware)	3.8 ± 0.8	4.2 ± 0.7	4.2 ± 0.6	4.1 ± 0.7
Visual graphics	4.3 ± 0.5	4.4 ± 0.7	4.0 ± 1.1	4.3 ± 0.8
Movements of the instruments	3.8 ± 0.9	4.4 ± 0.7	4.2 ± 0.7	4.1 ± 0.8
Interaction with objects	3.9 ± 0.9	4.2 ± 0.7	4.4 ± 0.8	4.2 ± 0.8
Depth perception	3.7 ± 0.9	4.6 ± 0.5	3.7 ± 1.4	4.0 ± 1.1
Exercise 1 “Camera Targeting”
Do you think the goal of the exercise is reached? (1 = surely not…5 = surely yes)	4.5 ± 0.5	4.57 ± 0.5	4.4 ± 0.5	4.5 ± 0.5
What is your opinion according to the following issues? (1 = very bad…5 = very good)
Content of the exercise	4.4 ± 0.6	4.2 ± 0.9	4.4 ± 0.8	4.3 ± 0.8
Training capacity of the exercise	4.5 ± 0.6	4.4 ± 0.8	4.5 ± 0.7	4.5 ± 0.7
Difficulty of the exercise	3.3 ± 1.0	3.6 ± 0.8	2.0 ± 1.1	3.0 ± 1.2
Exercise 2 “Thread the Rings”
Do you think the goal of the exercise is reached? (1 = surely not…5 = surely yes)	4.3 ± 1.0	4.2 ± 0.89	4.6 ± 0.7	4.4 ± 0.9
What is your opinion according to the following issues? (1 = very bad…5 = very good)
Content of the exercise	4.5 ± 0.6	4.5 ± 0.7	4.5 ± 0.7	4.5 ± 0.6
Training capacity of the exercise	4.3 ± 0.6	4.6 ± 0.6	4.9 ± 0.4	4.6 ± 0.6
Difficulty of the exercise	3.5 ± 0.9	3.3 ± 1.1	3.0 ± 1.0	3.3 ± 1.0
Exercise 3 “Peg Board”
Do you think the goal of the exercise is reached? (1 = surely not…5 = surely yes)	4.3 ± 0.9	4.2 ± 0.58	4.6 ± 0.5	4.4 ± 0.7
What is your opinion according to the following issues? (1 = very bad…5 = very good)
Content of the exercise	4.4 ± 0.7	4.2 ± 0.6	4.4 ± 0.7	4.3 ± 0.7
Training capacity of the exercise	4.3 ± 0.8	4.3 ± 0.8	4.5 ± 0.7	4.4 ± 0.8
Difficulty of the exercise	2.9 ± 0.9	2.9 ± 0.9	2.5 ± 1.2	2.7 ± 0.9

Values expressed in mean on a 1 to 5 Likert scale ± SD.