Designing a Practical UI for a Gesture-Based Interface

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We realized that the best way to deal with fatigue was to enable users to rest their elbow on a table or the arm of their chair. Our tests showed that for the first two buttons on the right side, the users had great results. Fatigue was minimal even after several minutes of interaction. To reach the two buttons on the left, however, the users had to raise their elbow, which brought back the problem of fatigue. This proved to be true even when we put all four buttons in a stack formation or a square formation. We kept coming up against the issue that only some of the points were convenient to select without having to bend the wrist or elbow in an uncomfortable way.

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