The Impact of Unaware Perception on Bodily Interaction in Virtual Reality Environments

Marcos Hilsenrat, Miriam Reiner
<span title="">2009</span> <i title="MIT Press - Journals"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/ilgyesikyzgyhcfwu7yqo3vf2a" style="color: black;">Presence - Teleoperators and Virtual Environments</a> </i> &nbsp;
Unaware haptic perception is often inferred but rarely demonstrated empirically. In this paper we present evidence for effects of unaware haptic stimuli on users' motor interaction with virtual objects. Using a 3D hapto-visual virtual reality, we ran a texture-difference-recognition test in which subjects glided a pen-like stylus along a virtual surface with varying roughness. We found that subjects were not aware of changes in texture roughness below a threshold limit, yet the normal force
more &raquo; ... applied, changed. Subjects didn't recognize on a cognitive level changes in the sensory cues, but behaved as if they did. These results suggest that performance can be affected, through subliminal cues. Based on results from visual perception studies, we also tested the impact of context background conditions on perception of unaware cues. We measured the threshold of awareness to changes in texture for several reference stimuli. We found that indeed, as in visual perception, this threshold for discriminating between the roughness of surfaces increases when texture gets smoother, i.e. sensitivity changes as a function of the background context. Implications are mainly in design of VR especially remote manipulation of objects.
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