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  4. Cogno-Vest: A Torso-Worn, Force Display to Experimentally Induce Specific Hallucinations and Related Bodily Sensations
 
research article

Cogno-Vest: A Torso-Worn, Force Display to Experimentally Induce Specific Hallucinations and Related Bodily Sensations

Fadaeijouybari, Atena  
•
Jeanmonod, Kenny  
•
Kannape, Oliver Alan  
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2022
IEEE Transactions on Cognitive and Developmental Systems

Recent advances in virtual reality and robotic technologies have allowed researchers to explore the mechanisms underlying bodily aspects of self-consciousness which are largely attributed to the multisensory and sensorimotor processing of bodily signals (bodily self-consciousness, BSC). One key contribution to BSC, that is currently poorly addressed due to the lack of a wearable solution, concerns realistic collision sensations on the torso. Here, we introduce and validate a proof-of-concept prototype of torso-worn force display, the Cogno-vest, that provides mechanical touch on the user s back in a sensorimotor perception experiment. In a first empirical study, we characterized human finger poking (N=28). In order to match these poking characteristics and meet the wearability criteria, we used bi-directional, push-pull solenoids as a force actuator in the Cogno-vest. Subsequently, and based on an iterative design procedure, a body-conforming, unisex, torso-worn force display was prototyped. Finally, we conducted a behavioral study that investigated BSC in 25 healthy participants by introducing conflicting sensorimotor signals between their hand and torso (back). Using the final reiteration of the Cogno-vest we successfully replicated previous findings on illusory states of BSC, characterized by presence hallucinations (PH) and passivity symptoms, and achieved higher illusion ratings compared to static conditions used in prior studies.

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Type
research article
DOI
10.1109/TCDS.2021.3051395
Author(s)
Fadaeijouybari, Atena  
Jeanmonod, Kenny  
Kannape, Oliver Alan  
Potheegadoo, Jevita  
Bleuler, Hannes  
Hara, Masayuki
Blanke, Olaf  
Date Issued

2022

Published in
IEEE Transactions on Cognitive and Developmental Systems
Volume

14

Issue

2

Start page

497

End page

506

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LNCO  
CNP  
FunderGrant Number

Swiss foundations

3100A0-112493

Other foundations

19H04187

Available on Infoscience
March 27, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/176913
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