The IEEE VR Workshop on Perceptual Illusions in Virtual Environments (PIVE) is the first
international workshop focused on the topic of perceptual illusions in virtual environments (VEs)
and 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 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.
In these environments, a person’s actions can vary enormously as stimuli presented to the person
is manipulated. Such perceptually influenced actions have potential to broaden the use of applications
that take advantage of these illusions. In particular, these manipulations can be achieved
through differing input stimuli:
• Visual illusions allow to exploit the fact that vision usually dominates proprioceptive and
vestibular senses. Based on this, mechanisms like 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 exploit aural information to assist with manipulating a user’s perception
of a scene. For instance, such illusions may result in users perceiving (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 discrepancies can be further increased or where these concepts can be