self-presence in virtual environments leo yeykelis ph.d. candidate, communication, stanford...
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Self-Presence In Virtual Environments
Leo YeykelisPh.D. Candidate, Communication,
Stanford University
Motivation
Motivation
Self-presence
• Conceptual definition:– “a psychological state in which virtual self/selves
are experienced as the actual self in either sensory or nonsensory ways.” (Lee, 2004)
– “broadly defined as the extent to which some aspect of a person’s…self is relevant during media use.” (Ratan, 2010)
Out of Body Experience
• Conceptual definition:– “the experience in which a person who is awake
sees his or her body from a location outside the physical body” (Ehrsson, 2007)
– also referred to as “moving a human centre of awareness from one body to another” and “body swapping” (Petkova, 2008)
Self-presence or OBE?
Current Works
Ehrsson, 2007
Current Works
Ratan & Hasler, 2010
Current Works
Slater et al., 2010
Current Works
Petkova & Ehrsson, 2008
My Study
• Replication of Petkova & Ehrsson (2008), with the following modifications:– Immersive VR instead of mannequin– Addition of no touch condition– Added self-presence and spatial presence
measures
Measures
• Petkova & Ehrsson’s 7 point Likert questionnaire
• Modified Ratan’s “Proto Self-Presence” questions
• VHIL self-presence and spatial presence questionnaire
Implications
• OBE = self-presence? • Gender• Touch significantly improves inducing an out
of body experience, but only if it is synced with the virtual touch
• But…is touch (in the physical world) necessary?
Follow-up Studies
• Behavioral DVs– Physio responses to “threatening” objects (e.g.
virtual spear), another avatar’s touch, temperature shifts (e.g. virtual fire), avatar’s foot movement
• Avatar modifications– mimics the participants movements (sync vs. async),
looks like the participant, 3rd person vs. 1st person• Ideas/feedback
Q & A
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