Table S2.

The questionnaire statements

Statement number	Statement
S1	You are interested in the contents of the game.
S2	You feel physically present in the game environment.
S3	The progress of the game is appropriate.
S4	The gaming system is easy to operate.
S5	The gaming system has the same therapeutic effect as the traditional one.
S6	Playing the system makes you feel more relaxed than operating a conventional shoulder wheel.
S7	Playing the game can divert your attention and help you forget the uncomfortableness.
S8	You can focus on playing the game, and therefore the effectiveness of treatment can be improved.
S9	The rehabilitation progress is under control using this gaming system.
S10	Overall, you are satisfied with this gaming system.