Abstract
The role of the sense of touch in Human–Computer Interaction as a channel for feedback in manipulative processes is investigated through the research presented here. The paper discusses how information and feedback as generated by the computer can be presented haptically, and focusses on the feedback that supports the articulation of human gesture. A range of experiments are described that investigate the use of (redundant) tactual articulatory feedback. The results presented show that a significant improvement of effectiveness only occurs when the task is sufficiently difficult, while in some other cases the added feedback can actually lower the effectiveness. However, this work is not just about effectiveness and efficiency, it also explores how multimodal feedback can enhance the interaction and make it more pleasurable—indeed, the qualitative data from this research show a perceived positive effect for added tactual feedback in the overall experience. The discussion includes suggestions for further research, particularly investigating the effect in free moving gestures, multiple points of contact, and the use of more sophisticated actuators.
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