Document Detail

The rubber hand illusion depends on a congruent mapping between real and artificial fingers.
MedLine Citation:
PMID:  25103418     Owner:  NLM     Status:  Publisher    
The rubber hand illusion (RHI), in which a visible artificial hand is touched (or moves) synchronously with the participant's unseen own hand, indicates that body representations can undergo rapid changes. While several constraints for this illusion have been described, some reports highlight a remarkable flexibility of body representations, even contradicting a priori assumptions regarding body appearance and anatomy (e.g., the subjective embodiment of a third arm). Here we examine the impact of congruence between touches at (or movements of) the real and the artificial hand, as well as the role of predictability of touches (or movements). We implemented two versions of the RHI paradigm, based on passive tactile stimulation and active voluntary movements. The results show that (a) predictability does not modulate perceived embodiment, and that (b) congruent mapping between real and artificial fingers is a necessary condition for both the tactile and the motor RHI. Together with previously reported constraints for bodily illusions, these results are reduced to four principles, which determine subjective embodiment: temporal synchrony, congruence of mapping between real and artificial body parts, body unity and body shape.
Martin Riemer; Xaver Fuchs; Florian Bublatzky; Dieter Kleinböhl; Rupert Hölzl; Jörg Trojan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-8-4
Journal Detail:
Title:  Acta psychologica     Volume:  152C     ISSN:  1873-6297     ISO Abbreviation:  Acta Psychol (Amst)     Publication Date:  2014 Aug 
Date Detail:
Created Date:  2014-8-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370366     Medline TA:  Acta Psychol (Amst)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  34-41     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier B.V. All rights reserved.
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