Effects of Virtual Hand Representation on Interaction and Embodiment in HMD-based Virtual Environments Using Controllers

Lougiakis, Christos; Katifori, Akrivi; Ρούσσου, Μαρία; Ioannidis, Ioannis-Panagiotis

doi:10.1109/vr46266.2020.1581086151885

Cited by 14 publications

(20 citation statements)

References 23 publications

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“…In the present paper, we describe the combination of these two aspects as "user representations" [4]. A series of studies has demonstrated that user representations in VR differently impact the degree of experienced embodiment [5], [6], multisensory integration [7], attentional processing [8], distance perception [9], size estimation [10]- [12], and task performance [13]. Hence, it is possible that the detection of visual content in an immersive 3D virtual environment is also differently modulated, depending on the type of user representation used to interact in VR.…”

Section: ----------------mentioning

confidence: 99%

“…Using hand-held controllers as input device, Lougiakis et al [13] found that visually representing the user with virtual hands in VR leads to stronger body ownership, in comparison to being represented by a virtual controllers or sphere. However, the sense of agency is equivalent for the different virtual representations.…”

Section: Virtual Representations Of the User In Vrmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Information Placement and User Representations in VR on Performance and Embodiment

Seinfeld

Feuchtner

Pinzek

et al. 2022

IEEE Trans. Visual. Comput. Graphics

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Human sensory processing is sensitive to the proximity of stimuli to the body. It is therefore plausible that these perceptual mechanisms also modulate the detectability of content in VR, depending on its location. We evaluate this in a user study and further explore the impact of the user's representation during interaction. We also analyze how embodiment and motor performance are influenced by these factors. In a dual-task paradigm, participants executed a motor task, either through virtual hands, virtual controllers, or a keyboard. Simultaneously, they detected visual stimuli appearing in different locations. We found that, while actively performing a motor task in the virtual environment, performance in detecting additional visual stimuli is higher when presented near the user's body. This effect is independent of how the user is represented and only occurs when the user is also engaged in a secondary task. We further found improved motor performance and increased embodiment when interacting through virtual tools and hands in VR, compared to interacting with a keyboard. This study contributes to better understanding the detectability of visual content in VR, depending on its location in the virtual environment, as well as the impact of different user representations on information processing, embodiment, and motor performance.

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Section: ----------------mentioning

confidence: 99%

Section: Virtual Representations Of the User In Vrmentioning

confidence: 99%

Impact of Information Placement and User Representations in VR on Performance and Embodiment

Seinfeld

Feuchtner

Pinzek

et al. 2022

IEEE Trans. Visual. Comput. Graphics

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show abstract

“…However, this efect can also depend on the DoF provided by the user representation compared to the DoF provided by the input device. For example, while Argelaguet et al [4] found that agency was better with unrealistic hands (sphere and skeleton hand, so with limited DoF) using Leap Motion, Lougiakis et al [61] found no diference between diferent hand appearances with a similar protocol using controllers. A potential explanation for this could be that controllers ofer less DoF and thus reduce expectations in terms of hand control.…”

Section: Input Devicesmentioning

confidence: 99%

Towards “Avatar-Friendly” 3D Manipulation Techniques: Bridging the Gap Between Sense of Embodiment and Interaction in Virtual Reality

Dewez

Hoyet

Lécuyer

et al. 2021

Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems

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Avatars, the users' virtual representations, are becoming ubiquitous in virtual reality applications. In this context, the avatar becomes the medium which enables users to manipulate objects in the virtual environment. It also becomes the users' main spatial reference, which can not only alter their interaction with the virtual environment, but also the perception of themselves. In this paper, we review and analyse the current state-of-the-art for 3D object manipulation and the sense of embodiment. Our analysis is twofold. First, we discuss the impact that the avatar can have on object manipulation. Second, we discuss how the diferent components of a manipulation technique (i.e. input, control and feedback) can infuence the user's sense of embodiment. Throughout the analysis, we crystallise our discussion with practical guidelines for VR application designers and we propose several research topics towards "avatar-friendly" manipulation techniques. CCS CONCEPTS• Human-centered computing → Interaction design theory, concepts and paradigms.

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“…In general, research has shown that higher levels of kinematic fidelity can influence the users' sense of agency (i.e., sense of having motor control) [1,30] and their whole state of presence [25]. On the other hand, higher levels of visual fidelity have been shown to improve the sense of ownership (i.e., the virtual body is experienced as users' own body) [1,17,26]. In addition, hands structural (e.g., extra/fewer fingers) and appearance (e.g., gender models, size) differences can also affect the sense of ownership [22,27,31,32].…”

Section: The Impact Of Virtual Hands Characteristics On User Experience In Vrmentioning

confidence: 99%

The influence of hand visualization in tool-based motor-skills training, a longitudinal study

Ricca

Chellali²,

Otrnane³

2021

2021 IEEE Virtual Reality and 3D User Interfaces (VR)

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Mastering motor skills requires performing the task unconsciously with great speed and accuracy. This is acquired slowly through practice over time. Nonetheless, in domains such as surgery, the training of these skills in the field introduces safety, ethical and economic issues. In this context, immersive VR technologies offer the possibility to recreate real-world situations and allow the trainees to improve their skills in a safe and controlled environment. However, the design of such systems raises new research questions, such as how to represent the user in the virtual environment, and whether this representation can influence motor skills automaticity.In this work, we focus on how the user's hand representation can impact the training of tool-based motor skills in immersive VR. To investigate this question, we have created a VR simulator for training a tool-based pick and place task, and conducted a user study to evaluate how the user's hand visualization can influence participants' learning performance after a two-week training period. For that purpose, two groups of participants were trained in the VR simulator under one of the two experimental conditions: the presence and the absence of their virtual hands' representation, while a control group received no training. The results of the study show that training on the VR simulator improves the participants' motor task performance when compared with the control group. On the other hand, no difference was observed between the two training groups. This suggests that the user's hand visualization does not always impact tool-based motor tasks training in immersive VR simulators. Indeed, for short-term motor training there was no difference in performance between having a partial embodiment of the user's hands and only the tools representation.

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Effects of Virtual Hand Representation on Interaction and Embodiment in HMD-based Virtual Environments Using Controllers

Cited by 14 publications

References 23 publications

Impact of Information Placement and User Representations in VR on Performance and Embodiment

Impact of Information Placement and User Representations in VR on Performance and Embodiment

Towards “Avatar-Friendly” 3D Manipulation Techniques: Bridging the Gap Between Sense of Embodiment and Interaction in Virtual Reality

The influence of hand visualization in tool-based motor-skills training, a longitudinal study

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