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Psychometrics of Disembodiment and Its Differential Modulation by Visuomotor and Visuotactile Mismatches


Roel Lesur, Marte; Weijs, Marieke Lieve; Simon, Colin; Kannape, Oliver Alan; Lenggenhager, Bigna (2020). Psychometrics of Disembodiment and Its Differential Modulation by Visuomotor and Visuotactile Mismatches. iScience, 23(3):1-20.

Abstract

Altered states of embodiment are fundamental to the scientific understanding of bodily self consciousness. The feeling of disembodiment during everyday activities is common to clinical conditions; however, the direct study of disembodiment in experimental setups is rare compared to the extensive investigation of illusory embodiment of an external object. Using mixed reality to modulate embodiment through temporally mismatching sensory signals from the own body, we assessed how such mismatches affect phenomenal and physiological aspects of embodiment and measured perceptual thresholds for these across multimodal signals. The results of a principal component analysis suggest that multimodal mismatches generally induce disembodiment by increasing the sense of disownership and deafference and decreasing embodiment; however, this was not generally reflected in physiological changes. Although visual delay decreased embodiment both during active movement and passive touch, the effect was stronger for the former. We discuss the relevance of these findings for understanding bodily self plasticity.

Abstract

Altered states of embodiment are fundamental to the scientific understanding of bodily self consciousness. The feeling of disembodiment during everyday activities is common to clinical conditions; however, the direct study of disembodiment in experimental setups is rare compared to the extensive investigation of illusory embodiment of an external object. Using mixed reality to modulate embodiment through temporally mismatching sensory signals from the own body, we assessed how such mismatches affect phenomenal and physiological aspects of embodiment and measured perceptual thresholds for these across multimodal signals. The results of a principal component analysis suggest that multimodal mismatches generally induce disembodiment by increasing the sense of disownership and deafference and decreasing embodiment; however, this was not generally reflected in physiological changes. Although visual delay decreased embodiment both during active movement and passive touch, the effect was stronger for the former. We discuss the relevance of these findings for understanding bodily self plasticity.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:06 Faculty of Arts > Institute of Psychology
Dewey Decimal Classification:150 Psychology
Scopus Subject Areas:Health Sciences > Multidisciplinary
Language:English
Date:1 March 2020
Deposited On:12 Jan 2021 11:53
Last Modified:01 Feb 2021 16:18
Publisher:Cell Press (Elsevier)
ISSN:2589-0042
OA Status:Gold
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.1016/j.isci.2020.100901
PubMed ID:32109678
Project Information:
  • : FunderSNSF
  • : Grant IDPP00P1_170511
  • : Project TitlePlasticity of the bodily self in a life span approach

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