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. 2020 Nov 23;17:155. doi: 10.1186/s12984-020-00789-w

Fig. 2.

Fig. 2

An example of an online algorithm in virtual piano game. An online algorithm is modifying the difficulty levels for the virtual piano game by using the real-time assessment of finger individuation during the piano game (see text for details). The objective for the algorithm is to allow the participants with various levels of finger impairment to successfully press the virtual piano keys while at the same time keeping the activity sufficiently challenging