Fig. 6
As shown in (a), the subject sat in front of a chair and used the MI paradigm to simulate controlling a ball on a GUI, inducing different levels of frustration by the accuracy of the background control. (b) is a more detailed example of the GUI, there are two blue square areas on the left and right sides of the screen in front of the user. When the user imagines the movement, the red ball in the picture will move to the left or right with different success rates according to the design of the experiment. When the ball moves to the middle of the blue square area, the screen will prompt success or failure, accompanied by certain sound effects. The lower right corner is the round of the experiment.
