Abstract
The objective of this research was to study the suitability of multi-modal sensory substitution for force-feedback. This substitution is appealing because sound force feedback requires large, heavy, and expensive equipment. In a series of experiments we investigated the substitution of force feedback in judging objects' properties related to the kinesthetic perception. Forces of varying strength were presented by vibro-tactile, visual, or auditory feedback, or combinations thereof. We tested the suitability of substitutes in two manipulation experiments: in the first, the participant had to judge the weight of cubes relative to each other; in the second, the participant had to judge the amount of force necessary to move a brick due to frictional resistance. The trials were performed using a partially immersive desktop virtual reality system and a CyberTouch data glove that provides vibro-tactile feedback. Results show that just one substitute is sufficient to successfully complete the task. However, the task performance, in terms of correct discrimination and time, improved when a combination of substituting stimuli was presented.
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