The role of interaction in virtual embodiment: Effects of the virtual hand representation

Argelaguet, Ferran; Hoyet, Ludovic; Trico, Michaël; Lécuyer, Anatole

doi:10.1109/vr.2016.7504682

Cited by 255 publications

(212 citation statements)

References 39 publications

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“…To achieve AR, we converted the Oculus into a see-through HMD by attaching a camera to the front, which provides live video from the user's point of view. The tracking data and camera stream are both channeled into Unity 3 , where we have built a "scene" with virtual representations of the interactive devices in the room and a plane onto which the camera image is projected. Furthermore, this scene contains a virtual full body avatar: a 3D model of a young man that is a standard asset in Unity.…”

Section: Methodsmentioning

confidence: 99%

“…It is however unclear if ownership persists when the arm length is actively controlled by the user and used for interaction. Two active VHI studies, where the virtual hand can be controlled and ownership is explored during interaction, is the recent work by Lin and Jörg [38] and Argelaguet et al [3]. The first presents a VHI comparing 6 different hand representations of varying realism, which participants used to fend off spheres flying towards them in VR.…”

Section: Body Ownership Illusions (Bois)mentioning

confidence: 99%

“…Examples for such are the very long arm illusion [35], and also the referenced work exploring the effect of connectivity on ownership [48,53]. Those VHI studies that do support interaction [3,38] do not support distant reaching and the realism of the virtual environment is limited. We argue that controlling real objects in the environment with our AR setup provides a very different experience.…”

Section: Body Ownership Illusions (Bois)mentioning

confidence: 99%

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Extending the Body for Interaction with Reality

Feuchtner

Müller

2017

Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems

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Figure 1: We present an ownership-preserving direct manipulation technique in augmented reality, which allows interaction with remote devices in a ubicomp environment with the help of a long virtual arm. While the user's real hand is close to the body the virtual arm is of normal length (A) and by simply reaching out the user can make it extend to access remote devices in the room. For instance we allow adjusting the height of a table (B), opening and closing a curtain (C) and adjusting the angle of a tilting surface (D). ABSTRACTIn this paper, we explore how users can control remote devices with a virtual long arm, while preserving the perception that the artificial arm is actually part of their own body. Instead of using pointing, speech, or a remote control, the users' arm is extended in augmented reality, allowing access to devices that are out of reach. Thus, we allow users to directly manipulate real-world objects from a distance using their bare hands. A core difficulty we focus on is how to maintain ownership for the unnaturally long virtual arm, which is the strong feeling that one's limbs are actually part of the own body. Fortunately, what the human brain experiences as being part of the own body is very malleable and we find that during interaction the user's virtual arm can be stretched to more than twice its real length, without breaking the user's sense of ownership for the virtual limb.

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Section: Methodsmentioning

confidence: 99%

Section: Body Ownership Illusions (Bois)mentioning

confidence: 99%

Section: Body Ownership Illusions (Bois)mentioning

confidence: 99%

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Extending the Body for Interaction with Reality

Feuchtner

Müller

2017

Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems

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“…The impact of a self-avatar has been extensively investigated, including the visual embodiment of the user, means of interaction with the world, means of sensing various attributes of the world etc [5,14]. As described in detail previously [15], some authors have looked at the mechanisms by which the self-avatar embodies the user, thus the user can experience the selfavatar as their own body [15,22].…”

Section: Self-avatar or No Self-avatarmentioning

confidence: 99%

The impact of self-avatars on trust and collaboration in shared virtual environments

Pan

Steed

2017

PLoS ONE

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A self-avatar is known to have a potentially significant impact on the user's experience of the immersive content but it can also affect how users interact with each other in a shared virtual environment (SVE). We implemented an SVE for a consumer virtual reality system where each user's body could be represented by a jointed self-avatar that was dynamically controlled by head and hand controllers. We investigated the impact of a self-avatar on collaborative outcomes such as completion time and trust formation during competitive and cooperative tasks. We used two different embodiment levels: no self-avatar and self-avatar, and compared these to an in-person face to face version of the tasks. We found that participants could finish the task more quickly when they cooperated than when they competed, for both the self-avatar condition and the face to face condition, but not for the no self-avatar condition. In terms of trust formation, both the self-avatar condition and the face to face condition led to higher scores than the no self-avatar condition; however, collaboration style had no significant effect on trust built between partners. The results are further evidence of the importance of a self-avatar representation in immersive virtual reality.

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“…For instance, Kilteni et al (2012b) investigated body space and limb plausibility and found that participants tolerated having a virtual arm longer than their real one, while Argelaguet et al (2016) found that a realistic virtual hand elicited a stronger sense of ownership than more abstract representations. Other studies have also explored one's body weight perception by altering the complexity of the avatar (Piryankova et al, 2014), the effects of social anxiety responses to standing in front of an audience when having an invisible body (Guterstam et al, 2015), or how racial bias can be reduced by using an avatar of a black person (Peck et al, 2013).…”

Section: Ownership Illusion In Vrmentioning

confidence: 99%

“Wow! I Have Six Fingers!”: Would You Accept Structural Changes of Your Hand in VR?

et al. 2016

Self Cite

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With the increasing demand in virtual reality applications and games, the need to understand how users perceive their virtual representation (avatar) is becoming more and more important. In particular, with the potential of virtual reality to alter and control avatars in different ways, the user representation in the virtual world does not always necessarily match the user body structure. In this context, this paper explores how users would accept as their own a six-digit realistic virtual hand. By measuring participants' senses of ownership (i.e., the impression that the virtual hand is actually our own hand) and agency (i.e., the impression to be able to control the actions of the virtual hand), we somehow evaluate the possibility of creating a Six-Finger Illusion in VR. We measured these two dimensions of virtual embodiment in a virtual reality experiment where participants performed two tasks successively: (1) a self-manipulation task inducing visuomotor feedback, where participants mimicked finger movements presented in the virtual scene and (2) a visuotactile task inspired by Rubber Hand Illusion protocols, where an experimenter stroked the hand of the user with a brush. The real and virtual brushes were synchronously stroking the participants' real and virtual hand, and in the case when the virtual brush was stroking the additional virtual digit, the real ring finger was also synchronously stroked to provide consistent tactile stimulation and elicit a sense of embodiment. Results of the experiment show that participants did experience high levels of ownership and agency of the six-digit virtual hand as a whole. We found higher levels of ownership and agency for the additional finger when the hand was fully animated, compared to a control group where the additional digit was not animated. Through the presented experiment, we found that participants responded positively to the possibility of controlling the six-digit hand despite the structural difference, and accepted the sixdigit virtual hand and individual digits as their own to some extent. These results bring preliminary insights about how avatar with structural differences can affect the senses of ownership and agency experienced by users in VR.

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The role of interaction in virtual embodiment: Effects of the virtual hand representation

Cited by 255 publications

References 39 publications

Extending the Body for Interaction with Reality

Extending the Body for Interaction with Reality

The impact of self-avatars on trust and collaboration in shared virtual environments

“Wow! I Have Six Fingers!”: Would You Accept Structural Changes of Your Hand in VR?

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