The Impact of Motion on Individual Simulator Sickness in a Moving Base VR Simulator with Head-Mounted Display (HMD)

2019 ◽  
pp. 461-472 ◽  
Author(s):  
Mara Kaufeld ◽  
Thomas Alexander
Keyword(s):  
Simulator Sickness ◽  
Head Mounted Display ◽  
Moving Base ◽  
The Impact ◽  
Vr Simulator

scholarly journals Hyper-reoriented walking in minimal space

2021 ◽  
Author(s):  
Sandro Ropelato ◽  
Marino Menozzi ◽  
Melody Ying-Yu Huang
Keyword(s):  
Rotation Speed ◽  
Physical Space ◽  
Simulator Sickness ◽  
Department Stores ◽  
Correction Algorithm ◽  
Head Mounted Display ◽  
Open Questions ◽  
Simulator Sickness Questionnaire ◽  
The Impact ◽  
The Ideal

AbstractWe present a new reorientation technique, “hyper-reoriented walking,” which greatly reduces the amount of physical space required in virtual reality (VR) applications asking participants to walk along a grid-like path (such as the most common layout in department stores). In hyper-reoriented walking, users walk along the gridlines with a virtual speed of twice the speed of real walking and perform turns at cross-points on the grid with half the speed of the rotation speed in the physical space. The impact of the technique on participants’ sense of orientation and increase in simulator sickness was investigated experimentally involving 19 participants walking in a labyrinth of infinite size that included straight corridors and 90° T-junctions at the end of the corridors. Walking accuracy was assessed by tracking the position of the head mounted display, and cyber-sickness was recorded with the simulator sickness questionnaire and with open questions. Walking straight forward was found to closely match the ideal path, which is the grid line, but slight errors occasionally occurred when participants turned at the T-junctions. A correction algorithm was therefore necessary to bring users back to the gridline. For VR experiments in a grid-like labyrinth with paths of 5 m in length, the technique reduces required size of the tracked physical walking area to 3 m × 2 m.

scholarly journals Gamification and Hazard Communication in Virtual Reality: A Qualitative Study

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4663
Author(s):  
Janaina Cavalcanti ◽  
Victor Valls ◽  
Manuel Contero ◽  
David Fonseca
Keyword(s):  
Virtual Reality ◽  
New Technologies ◽  
Training Environment ◽  
Hazard Communication ◽  
Head Mounted Display ◽  
Compliance Behavior ◽  
Before And After ◽  
Recorded Data ◽  
The Impact ◽  
Different Levels

An effective warning attracts attention, elicits knowledge, and enables compliance behavior. Game mechanics, which are directly linked to human desires, stand out as training, evaluation, and improvement tools. Immersive virtual reality (VR) facilitates training without risk to participants, evaluates the impact of an incorrect action/decision, and creates a smart training environment. The present study analyzes the user experience in a gamified virtual environment of risks using the HTC Vive head-mounted display. The game was developed in the Unreal game engine and consisted of a walk-through maze composed of evident dangers and different signaling variables while user action data were recorded. To demonstrate which aspects provide better interaction, experience, perception and memory, three different warning configurations (dynamic, static and smart) and two different levels of danger (low and high) were presented. To properly assess the impact of the experience, we conducted a survey about personality and knowledge before and after using the game. We proceeded with the qualitative approach by using questions in a bipolar laddering assessment that was compared with the recorded data during the game. The findings indicate that when users are engaged in VR, they tend to test the consequences of their actions rather than maintaining safety. The results also reveal that textual signal variables are not accessed when users are faced with the stress factor of time. Progress is needed in implementing new technologies for warnings and advance notifications to improve the evaluation of human behavior in virtual environments of high-risk surroundings.

Be[ing] You

2015 ◽  
pp. 18-32
Author(s):  
Lorna Ann Moore
Keyword(s):  
Digital Media ◽  
The Body ◽  
Mirror Stage ◽  
Head Mounted Display ◽  
Personal Accounts ◽  
The One ◽  
The Impact ◽  
The Relationship ◽  
The Way ◽  
Video Performance

This chapter discusses the one-to-one interactions between participants in the video performance In[bodi]mental. It presents personal accounts of users' body swapping experiences through real-time Head Mounted Display systems. These inter-corporeal encounters are articulated through the lens of psychoanalyst Jacques Lacan and his work on the “Mirror Stage” (1977), phenomenologist Maurice Merleau-Ponty (1968) and his writings on the Chiasm, and anthropologist Rane Willerslev's (2007) research on mimesis. The study of these positions provides new insights into the blurred relationship between the corporeal Self and the digital Other. The way the material body is stretched across these divisions highlights the way digital media is the catalyst in this in[bodied] experience of be[ing] in the world. The purpose of this chapter is to challenge the relationship between the body and video performance to appreciate the impact digital media has on one's perception of a single bounded self and how two selves become an inter-corporeal experience shared through the technology.

Exploring the Impact of Simulator Sickness on the Virtual World Experience

2016 ◽  
pp. 635-643 ◽  
Author(s):  
Crystal S. Maraj ◽  
Karla A. Badillo-Urquiola ◽  
Sushunova G. Martinez ◽  
Jonathan A. Stevens ◽  
Douglas B. Maxwell
Keyword(s):  
Virtual World ◽  
Simulator Sickness ◽  
The Impact

scholarly journals Evaluating the Authenticity of Virtual Environments: Comparison of Three Devices

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Aila Kronqvist ◽  
Jussi Jokinen ◽  
Rebekah Rousi
Keyword(s):  
Virtual Environments ◽  
Cost Effective ◽  
Simulator Sickness ◽  
Quality Of Results ◽  
Immersive Virtual Environments ◽  
Head Mounted Display ◽  
Immersive Virtual Environment ◽  
Specific Factors ◽  
Insight Into

Immersive virtual environments (VEs) have the potential to provide novel cost effective ways for evaluating not only new environments and usability scenarios, but also potential user experiences. To achieve this, VEs must be adequately realistic. The level of perceived authenticity can be ascertained by measuring the levels of immersion people experience in their VE interactions. In this paper the degree of authenticity is measured via anauthenticity indexin relation to three different immersive virtual environment devices. These devices include (1) a headband, (2) 3D glasses, and (3) a head-mounted display (HMD). A quick scale for measuring immersion, feeling of control, and simulator sickness was developed and tested. The HMD proved to be the most immersive device, although the headband was demonstrated as being a more stable environment causing the least simulator sickness. The results have design implication as they provide insight into specific factors which make experience in a VE seem more authentic to users. The paper emphasizes that, in addition to the quality of the VE, focus needs to be placed on ergonomic factors such as the weight of the devices, as these may compromise the quality of results obtained when examining studying human-technology interaction in a VE.

scholarly journals Enabling Cognitive Load-Aware AR with Rateless Coding on a Wearable Network

2008 ◽  
Vol 2008 ◽  
pp. 1-12 ◽  
Author(s):  
R. Razavi ◽  
M. Fleury ◽  
M. Ghanbari
Keyword(s):  
Energy Consumption ◽  
Cognitive Load ◽  
Error Correction ◽  
Wireless Network ◽  
Channel Coding ◽  
Rateless Coding ◽  
Head Mounted Display ◽  
Packet Arrival ◽  
Block Based ◽  
The Impact

Augmented reality (AR) on a head-mounted display is conveniently supported by a wearable wireless network. If, in addition, the AR display is moderated to take account of the cognitive load of the wearer, then additional biosensors form part of the network. In this paper, the impact of these additional traffic sources is assessed. Rateless coding is proposed to not only protect the fragile encoded video stream from wireless noise and interference but also to reduce coding overhead. The paper proposes a block-based form of rateless channel coding in which the unit of coding is a block within a packet. The contribution of this paper is that it minimizes energy consumption by reducing the overhead from forward error correction (FEC), while error correction properties are conserved. Compared to simple packet-based rateless coding, with this form of block-based coding, data loss is reduced and energy efficiency is improved. Cross-layer organization of piggy-backed response blocks must take place in response to feedback, as detailed in the paper. Compared also to variants of its default FEC scheme, results from a Bluetooth (IEEE 802.15.1) wireless network show a consistent improvement in energy consumption, packet arrival latency, and video quality at the AR display.

scholarly journals The impact of virtual reality training on laparoscopic surgical skills; A prospective blinded controlled trial

2021 ◽  
Vol 6 (1) ◽  
pp. 37-42
Author(s):  
Prashanth A T ◽  
Nishanth Lakshmikantha ◽  
Krish Lakshman
Keyword(s):  
Virtual Reality ◽  
Controlled Trial ◽  
Skills Training ◽  
Surgical Skills ◽  
Simulator Training ◽  
Research Centre ◽  
Controlled Study ◽  
Control Group ◽  
The Impact ◽  
Vr Simulator

Background. Laparoscopic surgery has gained popularity in the last few decades replacing open standard techniques in several procedures. While its use and scope expand, a standardized method of training and assessment in laparoscopic skills is lacking. Aim. To assess the effect of virtual reality (VR) training on laparoscopic surgical skills. Materials and Methods. It is a prospective, controlled study conducted at Sagar Hospital’s skill lab and Shanthi Hospital and Research Centre (SHRC). We included 27 post graduates in general surgery. They were divided into two groups. One group underwent training in VR Simulator for one week, 30 minutes each day. The second group received no training. Their proficiency while mobilizing the Gallbladder from its liver bed was assessed using a validated scale by a single blinded observer. Results. The statistical analysis was done using a non-parametric test (Mann-Whitney U test). Residents who underwent training in VR simulator got better scores in Overall rating and also in individual parameters when compared with the control group (P = <0.05). Conclusions. Laparoscopic surgical skills can be increased by using proficiency-based VR simulator training and it can be transferred to actual operations. VR simulators are a valid tool for laparoscopic surgical skills training.

scholarly journals Comparable human spatial memory distortions in physical, desktop virtual and immersive virtual environments

2022 ◽  
Author(s):  
Fiona Zisch ◽  
Coco Newton ◽  
Antoine Coutrot ◽  
Maria Murcia-Lopez ◽  
Anisa Motala ◽  
...  
Keyword(s):  
Spatial Memory ◽  
Path Integration ◽  
Goodness Of Fit ◽  
The Body ◽  
Small Scale ◽  
Spatial Distributions ◽  
Head Mounted Display ◽  
Physical Environments ◽  
Desktop Vr ◽  
The Impact

Boundaries define regions of space and are integral to episodic memories. The impact of boundaries on spatial memory and neural representations of space has been extensively studied in freely-moving rodents. But less is known in humans and many prior studies have employed desktop virtual reality (VR) which lacks the body-based self-motion cues of the physical world, diminishing the potentially strong input from path integration to spatial memory. We replicated a desktop-VR study testing the impact of boundaries on spatial memory (Hartley et al., 2004) in a physical room (2.4m x 2.4m, 2m tall) by having participants (N = 27) learn the location of a circular stool and then after a short delay replace it where they thought they had found it. During the delay, the wall boundaries were either expanded or contracted. We compared performance to groups of participants undergoing the same procedure in a laser-scanned replica in both desktop VR (N = 44) and freely-walking head mounted display (HMD) VR (N = 39) environments. Performance was measured as goodness of fit between the spatial distributions of group responses and seven modelled distributions that prioritised different metrics based on boundary geometry or walking paths to estimate the stool location. The best fitting model was a weighted linear combination of all the geometric spatial models, but an individual model derived from place cell firing in Hartley et al. 2004 also fit well. High levels of disorientation in all three environments prevented detailed analysis on the contribution of path integration. We found identical model fits across the three environments, though desktop VR and HMD-VR appeared more consistent in spatial distributions of group responses than the physical environment and displayed known variations in virtual depth perception. Thus, while human spatial representation appears differentially influenced by environmental boundaries, the influence is similar across virtual and physical environments. Despite differences in body-based cue availability, desktop and HMD-VR allow a good and interchangeable approximation for examining human spatial memory in small-scale physical environments.

Sign in / Sign up

Export Citation Format

Share Document