15:00 - 16:30
Tue-P3-Poster II-2
Tue-Poster II-2
Room: P3
Instant Disembodiment of Virtual Body Parts
Tue-P3-Poster II-202
Presented by: Julia Eck
Julia Eck 1, David Dignath 2, Andreas Kalckert 3, Roland Pfister 1
1 Department of Psychology III, University of Würzburg, Germany, 2 Department of Psychology, Eberhard Karls University of Tübingen, Germany, 3 Cognitive neuroscience and philosophy, University of Skövde, Sweden
Although it seems reasonable to assume that we should be able to distinct clearly what is part of the own body and what is not evidence coming from multisensory body illusions suggests that the body representation is astonishingly malleable. While the embodiment of external objects has been extensively studied in the last twenty years, the disembodiment of previously embodied entities was mostly neglected. The current study investigated the disembodiment of a previously embodied two-dimensional virtual hand that could be controlled by movements of a computer mouse or on a touchpad. To induce embodiment participants were instructed to move the virtual hand back-and-forth. Then we probed for disembodiment by comparing two conditions: participants either continued moving the virtual hand as before (active condition) or they stopped moving and kept the hand still (no-movement condition). We expected a continuously high level of embodiment for the active condition and a gradual disembodiment of the virtual hand in the no-movement condition because the body representation would be continuously updated by incoming correlated visuomotor signals in the former, but no multisensory updating would take place in the latter. In contrast to our hypothesis, participants instantly disembodied the virtual hand right after stopping to move. The results are in line with studies showing the embodiment of controllable virtual or physical external objects and extend them by demonstrating that a previously embodied virtual object becomes instantly disembodied as soon as embodiment of this object is no longer functional for current task performance.
Keywords: body representation, embodiment, disembodiment, moving rubber hand illusion