Predictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand

The rubber hand illusion (RHI) is a perceptual illusion, whereby a fake hand is recognized as one’s own hand when a fake hand and felt real hand are stroked synchronously. RHI strength is mainly assessed using a questionnaire rating and proprioceptive drift (PD). PD is characterized by the proprioce...

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Autores principales:	Satoshi Shibuya, Satoshi Unenaka, Yukari Ohki
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	body ownership rubber hand illusion multisensory integration delayed visual feedback predictability body representation Psychology BF1-990
Acceso en línea:	https://doaj.org/article/2fba69aa7fca4cdd9d1424143796a9c3
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spelling	oai:doaj.org-article:2fba69aa7fca4cdd9d1424143796a9c32021-11-12T04:47:19ZPredictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand1664-107810.3389/fpsyg.2021.771284https://doaj.org/article/2fba69aa7fca4cdd9d1424143796a9c32021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpsyg.2021.771284/fullhttps://doaj.org/toc/1664-1078The rubber hand illusion (RHI) is a perceptual illusion, whereby a fake hand is recognized as one’s own hand when a fake hand and felt real hand are stroked synchronously. RHI strength is mainly assessed using a questionnaire rating and proprioceptive drift (PD). PD is characterized by the proprioceptively sensed location of the participant’s own hand shifting toward the location of the fake hand after RHI. However, the relationship between the two measures of hand ownership and location remains controversial due to mixed findings: some studies report correlations between them, while others show that they are independent. Here, we demonstrated significant PD without RHI using delayed visual feedback. In this RHI study, video images of the fake hand were delivered to the subjects, and four delay intervals of visual feedback (80, 280, 480, and 680ms) were introduced. In four of six conditions, the delay interval was fixed throughout the condition. In the other two conditions, four delays were delivered in a predetermined order (i.e., serial condition; higher predictability) or in a pseudo-random order (i.e., random condition; low predictability). For the four conditions with a fixed delay, the questionnaire ratings and PD declined significantly when the delay interval exceeded circa 300ms. In both the serial and random conditions, no illusory ownership of the fake hand was reported in the questionnaire. In contrast, greater PD was found in the random condition but not in the serial condition. Our findings suggest that hand ownership and localization are caused by distinct multisensory integration processes.Satoshi ShibuyaSatoshi UnenakaYukari OhkiFrontiers Media S.A.articlebody ownershiprubber hand illusionmultisensory integrationdelayed visual feedbackpredictabilitybody representationPsychologyBF1-990ENFrontiers in Psychology, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	body ownership rubber hand illusion multisensory integration delayed visual feedback predictability body representation Psychology BF1-990
spellingShingle	body ownership rubber hand illusion multisensory integration delayed visual feedback predictability body representation Psychology BF1-990 Satoshi Shibuya Satoshi Unenaka Yukari Ohki Predictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand
description	The rubber hand illusion (RHI) is a perceptual illusion, whereby a fake hand is recognized as one’s own hand when a fake hand and felt real hand are stroked synchronously. RHI strength is mainly assessed using a questionnaire rating and proprioceptive drift (PD). PD is characterized by the proprioceptively sensed location of the participant’s own hand shifting toward the location of the fake hand after RHI. However, the relationship between the two measures of hand ownership and location remains controversial due to mixed findings: some studies report correlations between them, while others show that they are independent. Here, we demonstrated significant PD without RHI using delayed visual feedback. In this RHI study, video images of the fake hand were delivered to the subjects, and four delay intervals of visual feedback (80, 280, 480, and 680ms) were introduced. In four of six conditions, the delay interval was fixed throughout the condition. In the other two conditions, four delays were delivered in a predetermined order (i.e., serial condition; higher predictability) or in a pseudo-random order (i.e., random condition; low predictability). For the four conditions with a fixed delay, the questionnaire ratings and PD declined significantly when the delay interval exceeded circa 300ms. In both the serial and random conditions, no illusory ownership of the fake hand was reported in the questionnaire. In contrast, greater PD was found in the random condition but not in the serial condition. Our findings suggest that hand ownership and localization are caused by distinct multisensory integration processes.
format	article
author	Satoshi Shibuya Satoshi Unenaka Yukari Ohki
author_facet	Satoshi Shibuya Satoshi Unenaka Yukari Ohki
author_sort	Satoshi Shibuya
title	Predictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand
title_short	Predictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand
title_full	Predictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand
title_fullStr	Predictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand
title_full_unstemmed	Predictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand
title_sort	predictability of delayed visual feedback under rubber hand illusion modulates localization but not ownership of the hand
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/2fba69aa7fca4cdd9d1424143796a9c3
work_keys_str_mv	AT satoshishibuya predictabilityofdelayedvisualfeedbackunderrubberhandillusionmodulateslocalizationbutnotownershipofthehand AT satoshiunenaka predictabilityofdelayedvisualfeedbackunderrubberhandillusionmodulateslocalizationbutnotownershipofthehand AT yukariohki predictabilityofdelayedvisualfeedbackunderrubberhandillusionmodulateslocalizationbutnotownershipofthehand
_version_	1718431222958391296

Predictability of Delayed Visual Feedback Under Rubber Hand Illusion Modulates Localization but Not Ownership of the Hand

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