Abstract:
:In the rubber-hand illusion (RHI), when an actual hand hidden from view and a rubber hand in view are simultaneously stimulated, participants mistakenly perceive tactile sensation as arising from the rubber hand, not from the actual hand. Some studies have revealed that the magnitude of RHI decreases when the actual and rubber hand are incongruent in terms of hand angle. However, the acceptable range of angular deviations between the actual and rubber hand and its determination factor has not been investigated so far. I attempt to examine the angle-congruency effect between the actual and rubber hands on RHI. The left rubber hand simulated by 3-D computer graphics was rotated at 8 angles. Participants perceived higher ownership of the stimulated rubber hand when the angles were at 0 degrees, 45 degrees, 90 degrees, and 315 degrees (these are easy to mimic with the actual hand) than at 180 degrees, 225 degrees, and 270 degrees (these are difficult to mimic with the actual hand). The perceived location of the actual hand became closer to that of the simulated rubber hand with increased perception of ownership of the rubber hand. Moreover, the onset duration of RHI became shorter, especially for the angles of 0 degrees, 45 degrees, and 315 degrees. These results suggest that RHI occurs mainly within the range where people usually rotate their hand and that body representation might include the knowledge of "anatomical plausibility".
journal_name
Perceptionjournal_title
Perceptionauthors
Ide Mdoi
10.1068/p7322subject
Has Abstractpub_date
2013-01-01 00:00:00pages
103-11issue
1eissn
0301-0066issn
1468-4233journal_volume
42pub_type
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