ViPong: Probabilistic haptic feedback for eyes-free interaction

We describe a mechanism for the delivery of haptic feedback to users of a simple game via the use of probabilistic inference. This not only enables the creation of dynamically changing game conditions but also a more adaptable, accessible and enjoyable haptic gaming environment for potential use by visually impaired users. The ViPong proof of concept application uses a mouse instrumented with a custom built lateral vibrator to enable a person to compete eyes-free in a game of pong using only haptic feedback linked to the position of the ball. A preliminary user study shows that it is possible to build eyes-free games using such a mechanism for haptic feedback generation. It also shows that there is some effect on the game play from varying levels of uncertainty injected into the algorithm, with participants performing less well under condition where the uncertainty added to the position of the game ball is high.