No consistent cooling of the real hand in the rubber hand illusion

Haan, Alyanne M. de; Stralen, Haike E. van; Smit, Miranda; Keizer, Anouk; Stigchel, Stefan Van der; Dijkerman, H. Chris

doi:10.1016/j.actpsy.2017.07.003

Cited by 73 publications

(50 citation statements)

References 70 publications

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“…Only the temperature measure tentatively suggests a condition-specific effect by revealing a significantly smaller increase of temperature for asynchronous compared to synchronous stroking. This is in line with literature suggesting that a decrease in body temperature links to own-body disembodiment during illusory embodiment of a fake body (Moseley et al, 2008;Salomon, Lim, Pfeiffer, Gassert, & Blanke, 2013; but see also de Haan et al, 2017), or in neurological damage (Moseley et al, 2008; but see also Lenggenhager et al, 2015). As in previous literature, such relatively lower temperature was in our data specifically found for the stimulated hand (Macauda et al, 2015) and only after longer stimulation (cp.…”

Section: Physiological Measures Remain Largely Unchangedsupporting

confidence: 94%

“…So far, we can only speculate on the reasons for this lack of significant results in the chosen threat-related implicit measures. While generally the relationship between explicit and implicit measures of embodiment manipulations has been questioned (de Haan et al, 2017;Rohde, Luca, & Ernst, 2011;Rohde, Wold, Karnath, & Ernst, 2013), and in the case of HRV a recent study found no differences after altering embodiment in a full-body illusion (Park et al, 2016), it may be that the ecological congruency of the seen environment and body might have impeded an effect on our implicit measures. This is, in our setup participants are actually seeing their own hand and surroundings, with a higher degree of ecological plausibility compared to previous setups (e.g.…”

Section: Physiological Measures Remain Largely Unchangedmentioning

confidence: 84%

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Achronopresence: how temporal visuotactile and visuomotor mismatches modulate embodiment

Lesur

Weijs

Simon

et al. 2019

Preprint

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The loss of body ownership, the feeling that your body and its limbs no longer belong to you, presents a severe clinical condition that has proven difficult to study directly. We here propose a novel paradigm using mixed reality to interfere with natural embodiment using temporally conflicting sensory signals from the own hand. In Experiment 1 we investigated how such a mismatch affects phenomenological and physiological aspects of embodiment, and identified its most important dimensions using a principle component analysis. The results suggest that such a mismatch induces a strong reduction in embodiment accompanied by an increase in feelings of disownership and deafference, which was, however, not reflected in physiological changes. In Experiment 2 we refined the paradigm to measure perceptual thresholds for temporal mismatches and compared how different multimodal, mismatching information alters the sense of embodiment. The results showed that while visual delay decreased embodiment both while actively moving and during passive touch, the effect was stronger for the former. Our results extend previous findings as they demonstrate that a sense of disembodiment can be induced through controlled multimodal mismatches about one's own body and more so during active movement as compared to passive touch. Based on the ecologically more valid protocol we propose here, we argue that such a sense of disembodiment may fundamentally differ from disownership sensations as discussed in the rubber hand illusion literature, and emphasize its clinical relevance. This might importantly advance the current debate on the relative contribution of different modalities to our sense of body and its plasticity.

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Section: Physiological Measures Remain Largely Unchangedsupporting

confidence: 94%

Section: Physiological Measures Remain Largely Unchangedmentioning

confidence: 84%

Achronopresence: how temporal visuotactile and visuomotor mismatches modulate embodiment

Lesur

Weijs

Simon

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…Proprioceptive drift is supported by affective measurements on the real and fake hand. One study found a decrease in the real hand's skin temperature and a touch dulling effect (Moseley et al, 2008), although the result was not replicated in other studies (Rohde et al, 2013;De Haan et al, 2017). Also, the effects of somatosensory inputs to the real hand are reduced, leading to a lower intensity sensation (Folegatti et al, 2009;Zopf et al, 2011b;Kilteni and Ehrsson, 2017).…”

Section: The Rubber Hand Illusionmentioning

confidence: 96%

The Embodiment of Objects: Review, Analysis, and Future Directions

2019

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Here we offer a thorough review of the empirical literature on the conditions under which an object, such as a tool or a prosthetic (whether real or virtual), can be experienced as being in some sense a part or extension of one's body. We discuss this literature both from the standpoint of the apparent malleability of our body representations, and also from within the framework of radical embodied cognition, which understands the phenomenon to result not from an alteration to a representation, but rather from the achievement of a certain kind of sensory/motor coupling. We highlight both the tensions between these frameworks, and also areas where they can productively complement one another for future research.

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“…This null finding is in contrast to a previous 3PP-FBI study 20 . The relation of illusory self-identification with the decrease in body temperature is, however, controversial as other studies failed to replicate this finding 43,63 . Although Salomon et al 20 found temperature drops on the participants back and legs, Macauda et al 54 found an effect of the FBI on the hand, but not on the neck temperature, and they proposed that the temperature of visible body parts (the hand but not the neck in their study) can be modulated.…”

Section: Influence Of Empathymentioning

confidence: 99%

Measuring perceived self-location in virtual reality

Nakul

Orlando-Dessaints

Lenggenhager

et al. 2020

Sci Rep

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Third-person perspective full-body illusions (3PP-FBI) enable the manipulation, through multisensory stimulation, of perceived self-location. Perceived self-location is classically measured by a locomotion task. Yet, as locomotion modulates various sensory signals, we developed in immersive virtual reality a measure of self-location without locomotion. Tactile stimulation was applied on the back of twentyfive participants and displayed synchronously or asynchronously on an avatar's back seen from behind. Participants completed the locomotion task and a novel mental imagery task, in which they self-located in relation to a virtual ball approaching them. Participants self-identified with the avatar more during synchronous than asynchronous visuo-tactile stimulation in both tasks. This was accentuated for the mental imagery task, showing a larger self-relocation toward the avatar, together with higher reports of presence, bi-location and disembodiment in the synchronous condition only for the mental imagery task. In conclusion, the results suggest that avoiding multisensory updating during walking, and using a perceptual rather than a motor task, can improve measures of illusory self-location. open Scientific RepoRtS | (2020) 10:6802 | https://doi.org/10.1038/s41598-020-63643-y www.nature.com/scientificreports www.nature.com/scientificreports/ An often-reported limitation of the LT is that locomotion updates somatosensory, vestibular and interoceptive signals. Measures of self-location based on perceptual judgements rather than action-based judgements could minimize self-motion, reduce confounding sensory stimulation, and maintain illusory self-location. There is evidence to suggest that action-based judgments are less sensitive to visual illusions, as they rely on different neural pathways, than more perceptual judgments 37-39 . To measure self-location in non-moving participants, a "mental ball dropping task" has been used during 3PP-FBIs using video presentations of a human body 16,17,19 . Participants tested lying supine held a ball and had to indicate, with button presses, when they imagined dropping the ball and when the ball would hit the ground. After synchronous visuo-tactile stimulation, participants' evaluation of the time needed for the ball to reach the ground increased or decreased with regard to their illusion of being located above or below their body. Similar results were reported for a mental ball dropping task in VR 40 . However, the mental ball dropping task needs to be adapted to a more ecological 3PP-FBI in which participants are tested standing upright. Body positioning is important as lying supine modifies corporeal and extracorporeal space perception 41 . To our knowledge, there is still a lack of a measure of self-location which does not require changes in perceived self-location with respect to gravity, but rather with respect to the more ecological front-back or left-right axes. Second, participants exposed to VR are thought to distribute their self between the real and VR environments 33...

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No consistent cooling of the real hand in the rubber hand illusion

Cited by 73 publications

References 70 publications

Achronopresence: how temporal visuotactile and visuomotor mismatches modulate embodiment

Achronopresence: how temporal visuotactile and visuomotor mismatches modulate embodiment

The Embodiment of Objects: Review, Analysis, and Future Directions

Measuring perceived self-location in virtual reality

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