The Effect of Viewing a Self-Avatar on Distance Judgments in an HMD-Based Virtual Environment

Mohler, Betty J.; Creem-Regehr, Sarah H.; Thompson, William B.; Bülthoff, HH

doi:10.1162/pres.19.3.230

Cited by 180 publications

(136 citation statements)

References 43 publications

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“…It should be mentioned though that even calibrated HMDs are not free of geometric distortions (Kuhl et al 2009) which could have some influence on the estimation of the relative position of the virtual with respect to the real hand. However, it has also been found that such egocentric distance judgments improve when the participant is represented by an avatar (Mohler et al 2010). …”

Section: Proprioceptive Driftmentioning

confidence: 99%

Is my hand connected to my body? The impact of body continuity and arm alignment on the virtual hand illusion

2011

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When a rubber hand is placed on a table top in a plausible position as if part of a person's body, and is stroked synchronously with the person's corresponding hidden real hand, an illusion of ownership over the rubber hand can occur (Botvinick and Cohen 1998). A similar result has been found with respect to a virtual hand portrayed in a virtual environment, a virtual hand illusion (Slater et al. 2008). The conditions under which these illusions occur have been the subject of considerable study. Here we exploited the flexibility of virtual reality to examine four contributory factors: visuo-tactile synchrony while stroking the virtual and the real arms, body continuity, alignment between the real and virtual arms, and the distance between them. We carried out three experiments on a total of 32 participants where these factors were varied. The results show that the subjective illusion of ownership over the virtual arm and the time to evoke this illusion are highly dependent on synchronous visuo-tactile stimulation and on connectivity of the virtual arm with the rest of the virtual body. The alignment between the real and virtual arms and the distance between these were less important. It was found that proprioceptive drift was not a sensitive measure of the illusion, but was only related to the distance between the real and virtual arms.

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Section: Proprioceptive Driftmentioning

confidence: 99%

Is my hand connected to my body? The impact of body continuity and arm alignment on the virtual hand illusion

2011

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“…Recent studies have shown that presenting a self-avatar, which is a virtual body animated by subject, in a virtual environment can improve the accuracy of subject's egocentric distance estimation [Mohler, Creem-Regehr, Thompson, & Bülthoff, 2010;. Although some work has not found such effects [Geuss, Stefanucci, Creem-Regehr, & Thompson, 2010;McManus et al, 2011], we can infer that self-avatars can provide a more realistic way for people to interact with virtual environments.…”

Section: Introductionmentioning

confidence: 89%

The effect of avatar model in stepping off a ledge in an immersive virtual environment

Bodenheimer

2015

Proceedings of the ACM SIGGRAPH Symposium on Applied Perception

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Animated digital self-representations of the user in immersive virtual environments, called self-avatars, have been shown to be an aid in perceptual judgments in virtual environment and provide critical information for people deciding whether an action can be take or not. In this body of work, the size of the self-avatar is carefully calibrated to match the size of user. However, little attention has been paid to the graphical model used to represent the selfavatar. In this thesis, we further investigate the question of whether the form of the model can affect perceptual judgments in an IVE. We study this question in the context of affordance judgments, that is, properties of the virtual environment that represent possibilities for action.Our specific task concerns the judgment of stepping off a virtual ledge, a task we have studied before. In that work, we showed that the presence of a self-avatar provided important information in making the judgment of whether to step off the virtual ledge or not. In this work, we will again employ that task, but vary the underlying representation of the self-avatar across subjects to see if it affects this judgment. The forms of self-avatars vary between no self-avatar, a simple line-based skeleton avatar, or a full-body, rich polygonal, gender-matched self-avatar.Our results replicate our prior work, and show that presenting a self-avatar significantly affects people's perceptual judgment in virtual environments. However, the form of the self-avatar seem to make no difference in such tasks.

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“…Mohler et al (2010) stresses the importance of body representation in VR environments and shows that it significantly improves the users' ability to accurately judge scale and distance. Kulik et al (2011) focus on the importance of multi-user support in VR, and even state that it isn't VR if it isn't multi-user.…”

Section: Vr Technologies Related To Adaptation Of Manufacturing Procementioning

confidence: 98%

“…There are ways of recording and rendering the users body and posture back into the virtual environment in real time, examples of this is using VR-gloves or 3D imaging sensors to map the user's movements (Korves and Loftus 2000;Mohler et al 2010). If such a mapping is performed, this solution can support multi-user environments through rendering the mapped body and postures or an avatar representation of them back into the virtual environment (Beck et al 2013;Mohler et al 2010). Recent technological development has significantly decreased the cost of HMDs, compared to when the cited work was written.…”

Section: Vr Technologies Related To Adaptation Of Manufacturing Procementioning

confidence: 99%

Virtual Reality and 3D Imaging to Support Collaborative Decision Making for Adaptation of Long-Life Assets

Berglund

Gong

Sundström

et al. 2017

Dynamics of Long-Life Assets

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European companies of today are involved in many stages of the product life cycle. There is a trend towards the view of their business as a complex industrial product-service system (IPSS). This trend shifts the business focus from a traditional product oriented one to a function oriented one. With the function in focus, the seller shares the responsibility of for example maintenance of the product with the buyer. As such IPSS has been praised for supporting sustainable practices. This shift in focus also promotes longevity of products and promotes life extending work on the products such as adaptation and upgrades. Staying competitive requires continuous improvement of manufacturing and services to make them more flexible and adaptive to external changes. The adaptation itself needs to be performed efficiently without disrupting ongoing operations and needs to result in an acceptable after state. Virtual planning models are a key technology to enable planning and design of the future operations in parallel with ongoing operations. This chapter presents an approach to combine digitalization and virtual reality (VR) technologies to create the next generation of virtual planning environments. Through incorporating digitalization techniques such as 3D imaging, the models will reach a new level of fidelity and realism which in turn makes them accessible to a broader group of users and stakeholders. Increased accessibility facilitates a collaborative decision making process that invites and includes cross functional teams. Through such involvement, a broader range of experts, their skills, operational and tacit knowledge can be leveraged towards better planning of the upgrade process. This promises to shorten

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The Effect of Viewing a Self-Avatar on Distance Judgments in an HMD-Based Virtual Environment

Cited by 180 publications

References 43 publications

Is my hand connected to my body? The impact of body continuity and arm alignment on the virtual hand illusion

Is my hand connected to my body? The impact of body continuity and arm alignment on the virtual hand illusion

The effect of avatar model in stepping off a ledge in an immersive virtual environment

Virtual Reality and 3D Imaging to Support Collaborative Decision Making for Adaptation of Long-Life Assets

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