Abstract
The 3rd IEEE VR 2011 Workshop on Perceptual Illusions in Virtual Environments PIVE is
the third international workshop focused on the topic of perceptual illusions in virtual environments
VEs. PIVE 2011 will be held to foster discussions among participants and to provide an intensive
exchange between industrial and academic researchers working on various perception research
problems.
Virtual environments VEs provide humans with synthetic worlds in which they can interact with
their virtual surrounding. However, while interacting in a VE system, humans are still located in
the physical setup: they move through a laboratory space or may touch real-world objects. This
duality of being in the real world while receiving visual, haptic, or aural information from the
virtual world places users in a unique situation, forcing them to integrate or separate stimuli from
potentially different sources simultaneously. The fact that a person’s perception of a virtual reality
environment can vary enormously from the perception of real world environments opens up a broad
field of potential applications that take advantage of perceptual illusions. Such illusions arise from
misinterpretation by the brain of sensory information:
• Visual illusions exploit the fact that vision usually dominates proprioceptive and vestibular
senses. Based on this, redirected walking can force users to be guided on physical paths,
which may vary from the paths on which they perceive they are walking in the virtual world.
• Haptic illusions may give users the impression of feeling virtual objects by touching real
world props. The physical objects that represent and provide passive haptic feedback for the
virtual objects may vary in size, weight, or surface from the virtual counterparts without users
observing the discrepancy.
• Acoustic illusions may result in users perceive self- motion such as vection when no such
visual motion is being supplied.
The objective of the PIVE workshop is to foster discussions among participants and to provide
an intensive exchange between industrial and academic researchers. The workshop will provide
a venue for understanding perceptual thresholds in VEs and will facilitate exploratory discussion
for how the related perceptual deviations can be further increased or where these concepts can be
successfully applied.
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