Analysis of User Interaction with a Brain-Computer Interface Based on Steady-State Visually Evoked Potentials: Case Study of a Game

Table 2

Questionnaire items, translated from Brazilian Portuguese.

Question topic	Range limits
Cap comfort	0 very uncomfortable–10 very comfortable
Visual comfort of the stimulus	0 very uncomfortable–10 very comfortable
Fatigue caused by training/by the game	0 very tiring–10 very invigorating
Motivation for training	0 very boring–10 very exciting
Game challenge with BCI/keyboard	0 very easy–10 very challenging
Background color	0 unpleasant–10 pleasant
Pleasantness of the positioning of the stimuli	0 very uncomfortable–10 very comfortable
Pleasantness of background color	0 very uncomfortable–10 very comfortable
Acoustic feedback helps	0 not at all–10 a lot
Background music disturbs	0 not at all–10 a lot
Background music lacks	0 not at all–10 a lot
Intuitiveness of game controls	0 not intuitive at all–10 very intuitive
Dominion of game controls	0 total control–10 no control
Control by keyboard is	0 boring–10 fun
Pleasantness of game	0 unpleasant–10 pleasant