Search

We review the literature and relevant standards related to image quality characterization of medical devices using near‐eye displays (NEDs). First, we discuss the experimental considerations for NED measurements and the methods for aligning the light measuring device (LMD) to the NED. Second, we discuss measurement methods for several critical image quality characteristics, namely luminance, contrast, spatial resolution, geometrical distortion, and spatiotemporal properties including the methods' limitations. These characteristics were selected due to the importance of medical device NED applications. Finally, modeling methods for image quality of NEDs are discussed. Accurate and reproducible evaluation methods for image quality are essential for the safe and effective adoption of augmented and virtual reality NEDs into medical applications. [ABSTRACT FROM AUTHOR]

To enhance users' immersion in the mixed reality (MR) cross-scene environment, it is imperative to make geometric modifications to arbitrary multi-scale virtual scenes, including adjustments to layout and size, based on the appearance of diverse real-world spaces. Numerous studies have been conducted on the layout arrangement of pure virtual scenes; however, they often neglect the issue of incongruity between virtual and real environments. Our objective is to mitigate the incongruity between virtual and real scenes in MR, establish a rational layout and size for any virtual scene within an enclosed indoor environment, and leverage tangible real objects to achieve multi-class passive haptic feedback. To achieve these goals, we propose SMigraPH, a perceptually retained indoor scene migration method with passive haptics in MR. Firstly, we propose a scene abstraction technique for constructing mathematical representations of both virtual and real scenes, capturing geometric information and topological relationships, while providing a mapping strategy from the virtual to the real domain. Subsequently, we develop an optimization framework called v2rSA that integrates rationality, relationship preservation, haptic reuse, and scale fitting constraints in order to iteratively generate final layouts for virtual scenes. Finally, we render scenarios on optical see-through MR head-mounted displays (HMDs) to enable users to engage in realistic scene exploration and interaction with haptic feedback. We have conducted experiments and a user study on our proposed method, which demonstrates significant improvements in surface registration accuracy, haptic interaction efficiency, and fidelity compared to the state-of-the-art indoor scene layout arrangement method MakeItHome as well as the random placement approach RandomIn. The results of our approach closely resemble those achieved through manual placement using the Human method. [ABSTRACT FROM AUTHOR]

Purpose: Virtual Reality (VR) has proven to be an effective tool for motor (re)learning. Furthermore, with the current commercialization of low-cost head-mounted displays (HMDs), immersive virtual reality (IVR) has become a viable rehabilitation tool. Nonetheless, it is still an open question how immersive virtual environments should be designed to enhance motor learning, especially to support the learning of complex motor tasks. An example of such a complex task is triggering steps while wearing lower-limb exoskeletons as it requires the learning of several sub-tasks, e.g., shifting the weight from one leg to the other, keeping the trunk upright, and initiating steps. This study aims to find the necessary elements in VR to promote motor learning of complex virtual gait tasks. Methods: In this study, we developed an HMD-IVR-based system for training to control wearable lower-limb exoskeletons for people with sensorimotor disorders. The system simulates a virtual walking task of an avatar resembling the sub-tasks needed to trigger steps with an exoskeleton. We ran an experiment with forty healthy participants to investigate the effects of first- (1PP) vs. third-person perspective (3PP) and the provision (or not) of concurrent visual feedback of participants' movements on the walking performance – namely number of steps, trunk inclination, and stride length –, as well as the effects on embodiment, usability, cybersickness, and perceived workload. Results: We found that all participants learned to execute the virtual walking task. However, no clear interaction of perspective and visual feedback improved the learning of all sub-tasks concurrently. Instead, the key seems to lie in selecting the appropriate perspective and visual feedback for each sub-task. Notably, participants embodied the avatar across all training modalities with low cybersickness levels. Still, participants' cognitive load remained high, leading to marginally acceptable usability scores. Conclusions: Our findings suggest that to maximize learning, users should train sub-tasks sequentially using the most suitable combination of person's perspective and visual feedback for each sub-task. This research offers valuable insights for future developments in IVR to support individuals with sensorimotor disorders in improving the learning of walking with wearable exoskeletons [ABSTRACT FROM AUTHOR]

Technologies like virtual reality (VR) and augmented virtuality (AV) based on head-mounted display (HMD) have made immersive interactive narrative experience possible. To investigate the differences between HMD VR and HMD AV for interactive storytelling, an app entitled the Extended Journey has been designed, developed and deployed on both VR headsets and optical see-through (OST) mixed reality (MR) headsets. Subsequently, a within-subjects design experiment with sixty participants was conducted to measure different factors of user experience in HMD VR and HMD AV conditions. Additionally, a between-subjects design experiment with 62 participants was conducted to evaluate narrative immersion and presence. Quantitative results from the experiments reveal that HMD VR narrative had statistically significantly better narrative immersion, presence, enjoyment and perceived affinity of computer-generated (CG) characters compared with HMD AV narrative in the context of galleries and museums. Based on Sundar's Modality-Agency-Interactivity-Navigability (MAIN) model, we proposed and validated that sense of being-there and interaction mediated the relationship between immersive media modality and narrative immersion as well as empathy. Qualitative data and behavioral tests showed that young people have a higher preference for HMD VR over HMD AV, but for specific use scenarios, there is still a certain possibility of choosing HMD AV due to security and space limitations. These findings have theoretical implications for the psychology of VR and AV, and practical applications for HMD-based immersive narrative in general. [ABSTRACT FROM AUTHOR]

Immersive virtual reality (VR) is anticipated to peak in development this decade bringing new opportunities for 3D multimodal designing across all levels of education. The need for students to gain capabilities with multimodal texts—texts that combine two or more modes, such as spoken, written, and visual—is emphasised at all levels of education from P-12 in the Australian Curriculum. Likewise, the use of technology-supported pedagogies is increasing worldwide, rendering multimodal texts ubiquitous across all knowledge domains. This original, qualitative classroom research investigated students' 3D designing of multimodal texts using an immersive VR head-mounted display. Upper primary students (ages 10–12 years, n = 48) transferred their knowledge of ancient Rome through 2D drawing, writing, speaking, and 3D multimodal designing with VR. The application of multimodal analysis to video data, screen recordings, and think-aloud protocols, and the thematic coding of student and teacher interviews yielded four key findings: (i) VR gaming supported 3D multimodal designing through haptic and embodied experience, (ii) VR improved performance through creative redesigning, (iii) VR-supported knowledge application, consolidation, and transfer, and (iv) pedagogical strengths of VR were situated and transformed practice. This research is timely and significant given the increasing accessibility and affordability of VR and the need to connect research and pedagogical practice to support students' advanced knowledge and capabilities with multimodal learning across the curriculum. [ABSTRACT FROM AUTHOR]

The purpose of this study was to clarify the effects of the standing center of gravity sway by providing visual stimulus information as if the subjects were walking in virtual reality (VR) and by monitoring conditions with different corridor widths. We included 25 healthy young individuals in our study. The center of gravity sway was measured during open- and closed-eye static standing using images of walking in corridors of different widths (780 and 1600 mm) presented on a VR and personal computer monitor (Monitor). The parameters measured for the center of gravity sway were swing path length (SPL), height of excursion (HoE), and width of excursion (WoE). The results showed that the SPL and HoE values were significantly greater in the VR group than those in the Monitor group. The greater center of gravity sway in the VR compared with the Monitor group can be attributed to the ability of the head-mounted VR display to cover the entire field of vision and its head-tracking function. There was no change in the center of gravity sway with respect to the corridor width, which may be because the width of the corridor alone did not provide sufficient visual stimulation to affect physical function. This research could lead to further studies which could impact the motivation of patients for rehabilitation therapies. [ABSTRACT FROM AUTHOR]

Head-mounted augmented reality (HMD AR) technology in construction has shown promise in enhancing operational efficiency. Concurrently, the critical role of hazard identification (HI) in ensuring worker safety is well-documented. Despite this, studies delving into HMD AR's impact on HI, especially across varying task complexities, are limited. This study aims to bridge this gap by examining the influence of HMD AR on construction workers' HI in diverse task environments. The research engaged 48 participants in an experiment to evaluate their hazard situation awareness (HSA), cognitive load (CL), and task performance (TP). These were assessed using the Situation Awareness Global Assessment Technique (SAGAT), the Situation Awareness Rating Technique (SART), the National Aeronautics and Space Administration Task Load Index (NASA-TLX), and measures of task accuracy. Findings indicated that environmental conditions significantly modulate HMD AR's effect on HI. In simple and safe scenes, HMD AR has a negligible impact on HI and might enhance hazard detection capabilities. However, in complex and hazardous situations with intense workloads, HMD AR can impair HI, potentially increasing safety risks. In other words, whether HMD AR brings opportunities or risks for HI depends on the different environmental conditions. This research contributes to the nascent field of cognitive safety in HMD AR, specifically regarding HI in construction, augmenting the current understanding and laying a theoretical groundwork for HMD AR's future safety applications in the architecture, engineering, and construction (AEC) industry. The insights gained inform the prudent implementation, training, and interface design of HMD AR on construction sites. In the context of HMD AR's rapid evolution, this study underscores the importance of critically assessing safety implications to guide the responsible utilization of new technologies. Practical Applications: The findings from this study reveal that the impact of HMD AR on HI is contingent upon the complexity and safety of the work environment. In scenes that are straightforward and safe, HMD AR has been shown to improve HI among participants. Conversely, in environments that are complex and fraught with danger, HMD AR may hinder HI, increasing the likelihood of hazards. The conclusions of this study suggest that the safety management and application of HMD AR on construction sites should consider the opportunities and risks of using HMD AR in different environmental conditions. It is advised that decision makers on construction sites evaluate the suitability of HMD AR deployment based on the specific complexities of their scenes. In instances where the potential hazards are intricate, the use of HMD AR might be inadvisable. For sites already utilizing HMD AR, it is crucial to provide additional safety training to users. Such training should aim to enhance awareness of how HMD AR might affect HI, equipping workers with the knowledge to mitigate potential risks effectively. Furthermore, developers of HMD AR technologies are encouraged to focus on improving the safety features of their products. A key area of improvement is the optimization of information density on the HMD AR display interface. By doing so, developers can help prevent cognitive overload among users, thereby minimizing any adverse effects on HI. This approach not only enhances the safety on construction sites but also ensures that the benefits of HMD AR can be fully realized without compromising worker safety. [ABSTRACT FROM AUTHOR]

This study compared the effect of high and low levels of virtual reality (VR) immersion during moderate and high intensity cycling-exercise in younger (18–35 years), middle-aged (36–50 years), and older (51–69 years) adults. Thirty participants (5 female and 5 males per age group) completed moderate (steady state: 15 minutes at 60–75% maximum heart rate (MHR)) and high (sprint: 10 x 30 second sprints at 75–85% MHR) intensity cycling in four conditions: VR using a head-mounted display (High HMD), room-projector (Low Room), screen-projector (Low Screen) and No VR. Exercise performance measures (cadence, distance, power output) were recorded. Following each VR condition, exercise enjoyment (PACES) and exercise engagement (Flow State Scale) were measured. Results showed that exercise intensity had a significant effect of age on; heart rate (steady state and sprint), cadence (sprint) and distance (sprint) (p's <0.05). A significant effect of condition was observed during the sprint exercise for heart rate (p < 0.05). No other significant condition effects were observed for exercise performance. Significant effects of condition were identified for exercise engagement relating to sense of control (p < 0.01) and loss of self-consciousness (p < 0.05) with the highest values occurring in the Low Screen condition for all age groups, while transformation of time was significantly different (p < 0.05) for the middle-aged adults (highest during High VR and Low Screen). These results indicate that irrespective of age, participants found themselves in control and immersed more during the Low Screen VR condition than the other VR and No VR conditions. The findings indicate that VR immersion impacts exercise performance and exercise engagement in different age-groups and therefore should be considered when using VR to promote exercise behaviour. [ABSTRACT FROM AUTHOR]

Augmented Reality (AR) applications are known for using unconventional devices and enabling different ways to interact with the virtual elements of the environment. Head-mounted displays (HMDs), for example, enrich the user experience by providing greater immersion than other display devices. Most conventional HMDs are expensive or have restrictions, such as a limited field of view, making them inappropriate for many applications. With the increased computational power on mobile, some HMD models integrate conventional smartphones into the equipment. Smartphone-based HMDs have the advantage of being cheaper, so they can decrease the cost of AR systems. In addition, smartphone-based HMDs have the processing power, field of view, and camera quality required for most AR applications. Many applications that can use smartphone-based HMDs use the peripersonal space, distances of up to 1 meter from the user, as a region to interact with the virtual objects of the environment. As it is a specific region, it is essential to evaluate whether the device's limitations affect the performance of any interaction within this space. In this work, we created a system that combines a depth sensor and an HMD device to evaluate whether the user's performance using pinch gestures to interact inside the peripersonal space is uniform when using a smartphone-based HMD in AR applications. The results showed that such equipment is suitable for applications where interaction occurs under these conditions, as the user's performance in similar tasks is not affected when the interaction occurs within the peripersonal space. [ABSTRACT FROM AUTHOR]

Objective: Prolonged immobilization of joints after distal radius fracture (DRF) causes cerebral disuse-dependent plasticity (DDP) and deterioration of upper extremity function. Action observation therapy (AOT) can improve DDP. Trial design: This nonrandomized controlled trial (UMIN 000039973) tested the hypothesis that AOT improves hand-use difficulties during activities of daily living in patients with DRF. Method: Right-handed women with volar locking plate fixation for DRF were divided into AOT and Non-AOT groups for a 12-week intervention. The primary outcome was difficulty in using the fractured hand, assessed with the Japanese version of the Patient-related Wrist Evaluation (PRWE). The secondary outcomes were range of motion (ROM) of the injured side and gap between measured ROM and patient-estimated ROM. The survey was administered immediately post operation and at postoperative weeks 4, 8, and 12. The AOT group used a head-mounted display and three-dimensional video during ROM exercises. The Non-AOT group used active ROM exercises alone. A generalized linear model (GLM) was used to confirm interactions and main effects by group and time period, and multiple comparisons were performed. Results: Thirty-five patients were assigned to the AOT group (n = 18, median age, 74 years) or the Non-AOT group (n = 17, median age, 70 years). In the GLM, PRWE Total, PRWE Specific, and PRWE Usual scores revealed interactions between groups and periods. The post-hoc test revealed that the PRWE Specific scores (z = 3.43, p = 0.02) and PRWE Usual scores (z = 7.53, p<0.01) were significantly lower in the AOT group than in the Non-AOT group at 4 weeks postoperatively, whereas PRWE Total scores (z = 3.29, p = 0.04) were lower at 8 weeks postoperatively. Conclusions: These results suggested that AOT can improve hand-use difficulties in right-handed women after DRF surgery. AOT positively affects the motor imagery of patients with DRF and can reverse the patient's perceived difficulty in using the fractured hand during rehabilitation. [ABSTRACT FROM AUTHOR]

Background/Objectives: Informed consent for anesthesia poses both legal challenges and problems of understandable communication. Fulfilling all the requirements through anesthesiologists directly interacting with patients is a time- and staff-consuming strategy. Given today's smart technologies, notably including virtual reality (VR), we explored in a prospective randomized study whether 'VR-assisted informed consent' could improve this situation. Methods: Fifty patients scheduled for orthopedic surgery were randomized. In the control group, informed consent was obtained via patient–specialist dialogs only. The patients in the study group, wearing a head-mounted display, watched an 8 min immersive 3D movie with the standard explanations of general anesthesia, followed by a patient–specialist dialog to address open questions. The time spent on the dialogs in both groups was evaluated as the primary outcome variable. As secondary variables, we analyzed both a three-item Likert scale on patient satisfaction with the VR experience and cost differences between both groups. Results: Patient–specialist dialogs were carried on for median (IQR) durations of 93 (20–182) seconds in the study group versus 665 (261–829) seconds in the control group (p < 0.001). All the patients exposed to VR rated this experience as favorable (87.5%) or neutral (12.5%). Based on anesthesiologists' incomes in the US and UK, our approach would reduce the staff expenditure for each patient–specialist dialog by median amounts of USD ≈40 or ≈11, respectively (2 × p < 0.001). Conclusions: 'VR-assisted informed consent' for anesthesia is well accepted by patients and reduces the time requirements for patient–specialist dialogs, thus pointing out a potential avenue towards increasing the work-time efficiency of anesthesiologists. [ABSTRACT FROM AUTHOR]

With the rapid development of wearable biosensor technology, the combination of head-mounted displays and augmented reality (AR) technology has shown great potential for health monitoring and biomedical diagnosis applications. However, further optimizing its performance and improving data interaction accuracy remain crucial issues that must be addressed. In this study, we develop smart glasses based on augmented reality and eye tracking technology. Through real-time information interaction with the server, the smart glasses realize accurate scene perception and analysis of the user's intention and combine with mixed-reality display technology to provide dynamic and real-time intelligent interaction services. A multi-level hardware architecture and optimized data processing process are adopted during the research process to enhance the system's real-time accuracy. Meanwhile, combining the deep learning method with the geometric model significantly improves the system's ability to perceive user behavior and environmental information in complex environments. The experimental results show that when the distance between the subject and the display is 1 m, the eye tracking accuracy of the smart glasses can reach 1.0° with an error of no more than ±0.1°. This study demonstrates that the effective integration of AR and eye tracking technology dramatically improves the functional performance of smart glasses in multiple scenarios. Future research will further optimize smart glasses' algorithms and hardware performance, enhance their application potential in daily health monitoring and medical diagnosis, and provide more possibilities for the innovative development of wearable devices in medical and health management. [ABSTRACT FROM AUTHOR]

Virtual reality (VR) is a technology that allows users to experience multisensory and interactive environments that simulate real or imaginary scenarios. The effect of different VR immersive technology on mental workload (MWL), i.e., the amount of resources required to perform a task, is still debated; however the potential role of EEG in this context was never exploited. This paper aims to investigate the effects on MWL of performing a cognitive task in a VR environment in two conditions characterized by different degrees of immersion using a multimodal approach which combines well-assessed subjective evaluations of MWL with physiological EEG measures. A cognitive task based on the n-back test was proposed to compare the performance and MWL of participants who used either a head-mounted display (HMD) or a desktop computer to present the stimuli. The task had four different complexity levels (n = 1 or 2 with either visual or visual and audio stimuli). Twenty-seven healthy participants were enrolled in this study and performed the tasks in both conditions. EEG data and NASA Task Load indeX (NASA-TLX) were used to assess changes in objective and subjective MWL, respectively. Error rates (ERs) and reaction times (RTs) were also collected for each condition and task level. Task levels had significant effects on MWL, increasing subjective measures and decreasing performance, in both conditions. EEG MWL index have shown a significant increase especially if compared to rest. Different degrees of immersion did not show significant differences neither in individual's performance nor in MWL as estimated by subjective ratings. However, HMD reduced the EEG-derived MWL in most conditions indicating a lower cognitive load. In conclusion, HMD may reduce the cognitive load of some tasks. The reduced level of MWL, as depicted by the EEG MWL index, may have implications for the design and future evaluation of VR-based applications. [ABSTRACT FROM AUTHOR]

Virtual reality (VR) users experience unwanted symptoms, such as body imbalance, nausea, dizziness, and loss of presence. This study aims to investigate the effects of posture and locomotion on postural stability, cybersickness, and presence in VR environments. Twenty participants played a VR game under different conditions depending on posture (standing and sitting) and locomotion methods (joystick and teleportation), and seven dependent variables (COM, AP displacement, ML displacement, ASL, PSQ, VRSQ, and SOP) were analyzed to observe postural stability, cybersickness, and presence. The results revealed that postural instability increased when the task was performed in the standing posture with the joystick locomotion method compared to other conditions. The AP displacement, ML displacement, and ASL were lower under teleportation conditions. The PSQ scores indicated that postural stability was better in the sitting posture than in the standing posture. The VRSQ score revealed that the sitting with teleportation condition had less cybersickness than the other conditions. The SOP score was the highest in the standing posture with the teleportation condition. This study concludes that a sitting posture with teleportation locomotion can be considered when designing games in which users actively interact with virtual movements. [ABSTRACT FROM AUTHOR]

AbstractClassroom video use in teacher education is rising, but the interplay of video type (2D, panoramic) and viewing device (PC, HMD) on learning remains unexplored. This study examined the interactive effects of video type (2D, panoramic) and viewing device (PC, Head-Mounted Display [HMD]) on pre-service teachers’ learning performance. 143 pre-service teachers from a China university participated in a 2 × 2 randomized controlled experiment, viewing a 10-minute instructional video. Results indicate that panoramic video with HMD yielded the best learning outcomes, enhancing academic achievement, attention, presence, and immersion. Conversely, 2D video on HMD increased cognitive load. Interestingly, while PC-viewed panoramic video maximized attention, it also generated the highest cognitive load. Focus group interviews revealed the potential of immersive learning alongside challenges like motion sickness and navigation difficulties. This research provides empirical evidence for the interaction of video type and viewing devices in teacher education, informing the design of effective video-based learning. [ABSTRACT FROM AUTHOR]

This study introduces AffectiVR, a dataset designed for periocular biometric authentication and emotion evaluation in virtual reality (VR) environments. To maximize immersion in VR environments, interactions must be seamless and natural, with unobtrusive authentication and emotion recognition technologies playing a crucial role. This study proposes a method for user authentication by utilizing periocular images captured by a camera attached to a VR headset. Existing datasets have lacked periocular images acquired in VR environments, limiting their practical application. To address this, periocular images were collected from 100 participants using the HTC Vive Pro and Pupil Labs infrared cameras in a VR environment. Participants also watched seven emotion-inducing videos, and emotional evaluations for each video were conducted. The final dataset comprises 1988 monocular videos and corresponding self-assessment manikin (SAM) evaluations for each experimental video. This study also presents a baseline study to evaluate the performance of biometric authentication using the collected dataset. A deep learning model was used to analyze the performance of biometric authentication based on periocular data collected in a VR environment, confirming the potential for implicit and continuous authentication. The high-resolution periocular images collected in this study provide valuable data not only for user authentication but also for emotion evaluation research. The dataset developed in this study can be used to enhance user immersion in VR environments and as a foundational resource for advancing emotion recognition and authentication technologies in fields such as education, therapy, and entertainment. This dataset offers new research opportunities for non-invasive continuous authentication and emotion recognition in VR environments, and it is expected to significantly contribute to the future development of related technologies. [ABSTRACT FROM AUTHOR]

This data descriptor introduces GaitRec-VR, a 3D gait analysis dataset consisting of 20 healthy participants (9 males, 11 females, age range 21–56) walking at self-selected speeds in a real-world laboratory and the virtual reality (VR) replicas of this laboratory. Utilizing a head-mounted display and a 12-camera motion capture system alongside a synchronized force plate, the dataset encapsulates real and virtual walking experiences. A direct kinematic model and an inverse dynamic approach were employed for kinematics and computation of joint moments respectively, with an average of 23 ± 6 steps for kinematics and five clean force plate strikes per participant for kinetic analysis. GaitRec-VR facilitates a deeper understanding of human movement in virtual environments, particularly focusing on dynamic balance during walking in healthy adults, crucial for effective VR applications in clinical settings. The dataset, available in both.c3d and.csv formats, allows further exploration into VR's impact on gait, bridging the gap between physical and virtual locomotion. [ABSTRACT FROM AUTHOR]

Maintaining eye contact is a fundamental aspect of non-verbal communication, yet current remote communication tools, such as video calls, struggle to replicate the natural eye contact experienced in face-to-face interactions. This study presents a cutting-edge vision-sharing system for android avatars that enables remote eye contact by synchronizing the eye movements of the operator and the avatar. Our innovative system features an eyeball integrated with a wide-angle lens camera, meticulously designed to mimic human eyes in both appearance and functionality. This technology is seamlessly integrated into android avatars, enabling operators to perceive the avatar's surroundings as if physically present. It provides a stable and immersive visual experience through a head-mounted display synchronized with the avatar's gaze direction. Through rigorous experimental evaluations, we demonstrated the system's ability to faithfully replicate the operator's perspective through the avatar, making eye contact more intuitive and effortless compared with conventional methods. Subjective assessments further validated the system's capacity to reduce operational workload and enhance user experience. These compelling findings underscore the potential of our vision-sharing system to elevate the realism and efficacy of remote communication using android avatars. [ABSTRACT FROM AUTHOR]

Background: Immersive virtual reality has the potential to motivate and challenge patients who need and want to relearn movements in the process of neurorehabilitation. Objective: The aim of this study was to evaluate the feasibility and user acceptance of an innovative immersive virtual reality system (head-mounted display) used in combination with robot-assisted gait training in subjects suffering from neurological diseases. Methods: Fifteen participants suffering from cerebrovascular accident or spinal cord injury completed a single session of immersive virtual reality using a head-mounted display during a Lokomat® gait session. Training parameters and safety indicators were collected, and acceptance was investigated among participants and therapists. Results: The results suggest that an immersive virtual reality system is feasible in terms of safety and tolerance. Furthermore, the very positive overall acceptance of the system suggests that it has the potential to be included in a robot-assisted gait training session using Lokomat®. Conclusion: Overall, this study demonstrates that a fully immersive virtual reality system based on a head-mounted display is both feasible and well received by cerebrovascular accident and spinal cord injury patients and their therapists during robot-assisted gait training. This study suggests that such a virtual reality system could be a viable alternative to the screen-based training games currently used in neurorehabilitation. It may be especially suitable for enhancing patient motivation and adherence to training, particularly if the application is enjoyable and not mentally taxing. [ABSTRACT FROM AUTHOR]

The folded optics for HMD (head-mounted display), commonly referred to as pancake optics, is widely used to realize a compact HMD headset. The optics has the advantage of compactness, but also has a big drawback of lowering light efficiency. To overcome the issue, we proposed novel HMD pancake optics named "DP (double path) pancake optics" to achieve both compactness and high light efficiency simultaneously. In this paper, we introduce the principle of our "DP pancake optics" and review our prototype. We describe optical simulation results to find a highly balanced design among thickness, lens power, and magnification ratio. We also describe fabrication study of, such as polarization state and alignment accuracy. We successfully have fabricated two prototypes with 90° FOV (field of view), one of which is 20.6 mm optics thickness and the other is 25.5 mm optics thickness. The latter prototype especially shows high MTF with a 1200 ppi (pixel per inch) resolution LCD (liquid crystal display). Both prototypes have 1.8 times higher light efficiency than that of conventional one. In addition, to further expand the DP pancake optics, we also describe the improved design with wider FOV for future prototype fabrication. Therefore, we also show the optical simulation result of the improved design. [ABSTRACT FROM AUTHOR]

The construction industry is actively developing remote-controlled excavators to address labor shortages and improve work safety. However, visually induced motion sickness (VIMS) remains a concern in the remote operation of construction machinery. To predict the occurrence and severity of VIMS, we developed a prototype system that acquires multiple physiological signals with different mechanisms under a low burden and detects VIMS from the collected data. Signals during VIMS were recorded from nine healthy adult males operating excavator simulators equipped with multiple displays and a head-mounted display. Light gradient-boosting machine-based VIMS detection binary classification models were constructed using approximately 30,000 s of time-series data, comprising 23 features derived from the physiological signals. These models were validated using leave-one-out cross-validation on seven participants who experienced severe VIMS and evaluated through area under the curve (AUC) scores. The mean receiver operating characteristic curve AUC score was 0.84, and the mean precision–recall curve AUC score was 0.71. All features were incorporated into the models, with saccade frequency and skin conductance response identified as particularly important. These trends aligned with subjective assessments of VIMS severity. This study contributes to advancing the use of remote-controlled machinery by addressing a critical challenge to operator performance and safety. [ABSTRACT FROM AUTHOR]

Background: Augmented reality enables the wearer to see both their physical environment and virtual objects. Holograms could allow 3D video of providers to be transmitted to distant sites, allowing patients to interact with virtual providers as if they are in the same physical space. Our aim was to determine if Tele-Stroke augmented with Holo-Stroke, compared with Tele-Stroke alone, could improve satisfaction and perception of immersion for the patient. Methods: Kinect cameras positioned at 90-degree intervals around the hub practitioner were used. Cameras streamed real-time optical video to a unity point-cloud program where the data were stitched together in a 360-degree view. The resultant hologram was positioned in 3D space and was visible through the head-mounted display by the patient. Radiology images were shared in Tele-Stroke and via hologram. Likert satisfaction questions were administered. Wilcoxon signed-rank testing was used. Results: Each of the 30 neurology clinic participants scored both Tele-Stroke and Holo-Stroke. Out of these, 29 patients completed the assessments (1 failure owing to computer reboot). Average age was 52 years, with 53.3% of the patients being female, 70.0% being White, and 13.3% being Hispanic. Likert scale score median "Overall" was 32 Tele-Stroke versus 48 Holo-Stroke (p < 0.00001), "Immersion" was 5 versus 10 (p < 0.00001), "Beneficial Technique" was 6 versus 10 (p < 0.00001), and "Ability to See Images" was 5 versus 10 (p < 0.00001). Discussion: Holo-Stroke 3D holographic Tele-Stroke exams resulted in feasibility, satisfaction, and high perception of immersion for the patient. Patients were enthusiastic for the more immersive, personal discussion with their provider and a robust way to experience radiology images. Though further assessments are needed, Holo-Stroke can help the provider "be there, not just see there!" [ABSTRACT FROM AUTHOR]

With a growing interest in head-mounted display (HMD)-based virtual reality (VR) environments, there have been lots of studies enhancing user experience (UX) in the context. In particular, the study of motion sickness (MS) symptoms, which are a major barrier to providing a positive UX, is of high importance. This study investigated the effects of degree of freedom (DOF) and field of view (FOV) of HMD on MS symptoms. A user experiment was designed based on a 2 × 2 mixed design with DOF as a between-subject design variable (3-DOF and 6-DOF) and FOV as a within-subject design variable (Narrow and Wide). Participants experienced VR game content in four conditions in random order. MS symptoms were captured using heart rate variability (HRV) and virtual reality sickness questionnaire (VRSQ) at the pre- and post-task moment. The results showed that MS symptoms occurred more in the 3-DOF condition than in the 6-DOF. Further, MS symptoms in DOF conditions were adjusted depending on the FOV. In the Wide condition, we found a significant difference in MS symptoms depending on the DOF, but in the Narrow condition, no significant differences were found. Through this finding, we were able to not only show the effectiveness of HRV as MS measures but also provide meaningful design insights into HMD-based VR practices. [ABSTRACT FROM AUTHOR]

The metaverse offers new technological possibilities for conducting 3D immersive meetings with head-mounted displays that can enrich virtual teamwork. To conceptualize this new interaction space, we synthesize interdisciplinary findings from human-computer interaction literature, group research, and meeting science. We develop a conceptual framework of 3D immersive group meetings that integrates technological design characteristics, subjective attendee experiences, mediating mechanisms, and meeting outcomes. As a first empirical glimpse into this framework, we include a pilot study of group member's self-reported experiences and observed group dynamics in the metaverse. Building on our framework and first empirical insights, we discuss implications for future investigations of group dynamics in the metaverse. [ABSTRACT FROM AUTHOR]

Purpose: Social virtual reality (SVR) has emerged as a solution for the facilitation of remote and distributed teamwork, promising to overcome challenges faced in virtual 2D communication channels. The purpose of this study is to systematically review empirical articles dealing with the application of SVR with head-mounted displays (HMDs) in teams. Design/methodology/approach: This study reviewed 40 empirical papers on teamwork that address the application of SVR using HMD in teams. The authors present results from the extracted data and identify themes that indicate the current state of research in this field. Findings: Based on data obtained from the journal articles, the authors identified three themes underlying current research. They are features and applications of SVR technology, collaboration dynamics and team performance in SVR and educational and professional training and learning. The results show that SVR enhances team collaboration and collaborative learning. Practical implications: SVR can aid in improving teamwork and team outcomes. In its current stage, SVR is complementary to 2D technology and not likely to replace traditional tools. Findings suggest that the technology is promising for collaboration and learning in organisations, especially in collaborative design tasks and simulations. Originality/value: To the best of the authors' knowledge, this paper is one of the first studies to look at research emerging from the nascent area of SVR and summarise the current state of research. This study provides managerial implications and identifies future research areas for SVR in teamwork and learning. [ABSTRACT FROM AUTHOR]

With the rise of head-mounted displays (HMDs), immersive virtual reality (IVR) for second-language learning is gaining attention. However, current methods fail to fully exploit IVR's potential owing to the use of abstract avatars and limited human perspectives in learning experiences. This study investigated IVR's novel potential by using non-human avatars to understand complex concepts. We developed a system for learning English vocabulary through the actions of non-human avatars, offering a unique learning perspective. This paper presents an IVR vocabulary learning environment with a dragon avatar and compares word retention rates (immediate and one-week memory tests), subjective workload, and emotional changes with traditional methods. We also examined the vocabulary ranges that are teachable using this system by varying the number of avatars. The results showed that the proposed method significantly reduced forgotten English words after one week compared to traditional methods, indicating its effectiveness in the long term. [ABSTRACT FROM AUTHOR]

Background: Augmented reality (AR) technology involving head-mounted displays (HMD) represents a significant innovation in medical education, particularly for training in guided invasive procedures. Novice physicians often face challenges in simultaneously identifying anatomical landmarks and performing procedures when learning point-of-care ultrasound (POCUS). Our primary objective was to determine the effectiveness of AR in enhancing physician training for ultrasound-guided interventions using AR visual overlays. The secondary objective was to compare cognitive load between traditional ultrasound training settings and AR-assisted training settings. Methods: This randomized crossover study, conducted from 2021 to 2022, compared performance and cognitive load of trainees attempting accurate central venous catheter (CVC) placement using an AR-HMD to display ultrasound images (AR-US), compared with standard ultrasound without visual overlay (S-US). We enrolled 47 trainees, including 22 final-year undergraduate medical students and 25 postgraduate physicians (years 1–4) from three hospitals in Taiwan. All participants had basic training in US-guided CVC placement but lacked AR-US experience. Performance and cognitive load were assessed using time measurements and NASA Task Load Index (NASA-TLX), covering the dimensions of Mental-, Physical- and Temporal Demand, and Performance, Effort and Frustration. Results: We found AR technology reduced the time required for critical steps in CVC placement, while minimizing users' neck strain. Female and junior trainees using AR-US identified anatomy and localized veins faster than those using S-US. Using AR-US, female trainees significantly outperformed males in anatomical identification [mean difference (MD): -10.79 s (95% CI: -2.37 to -19.21)]. The NASA-TLX cognitive load assessment showed mental workload trending lower in all dimensions except performance while using AR-US, compared to S-US. Similarly, junior trainees' effort- and frustration scores were lower [MD: -2.73 (95% CI: -5.04 to -0.41) and -2.41 (95% CI: -4.51 to -0.31), respectively], as were female trainees' effort scores [MD: -3.07 (95% CI: -6.10 to -0.03)] when using AR-US, compared to S-US, whereby these differences were statistically significant. Conclusions: AR technology helped improve trainee performance and reduced cognitive load during ultrasound-guided CVC placement. These findings support the application of AR technology to enhance physician training in ultrasound-guided interventional procedures, suggesting that AR-HMDs could be a valuable tool in medical education. Trial registration: The trial was registered with Clinicaltrials.gov on 20/09/2023 as a clinical trial, under the identifier NCT 06055400. [ABSTRACT FROM AUTHOR]

Bodily illusions have been used to investigate one's sense of self and body ownership. This study explored the effect of the height of the first-person perspective (1PP) on out-of-body experience (OBE) illusion in which participants see their backs through a head-mounted display, receive visuotactile stimulation, and gradually feel as if they are sitting behind themselves, experiencing a sensation similar to an OBE. We hypothesized that increasing or decreasing the height of the 1PP would induce the OBE illusion at all heights and that participants' perceived own heights would adjust according to the 1PP height. We also predicted that the size and distance of external objects would vary according to the perceived height of one's own body. The results revealed that the OBE illusion occurred at all 1PP heights and was stronger when the 1PP height was lower or higher than usual. Meanwhile, the participants' perceived own heights, the sizes and distances of external objects did not change. These results suggest that manipulating the 1PP may affect the magnitude of the OBE illusion, but not the perception of the dimensions of the self or external objects. The height of 1PP may be one of the important factors in the bodily illusion. [ABSTRACT FROM AUTHOR]

This study proposed an intuitive teleoperation approach utilizing the hand-tracking mode supported by commercialized virtual reality devices. Unlike previous studies that used handheld controllers connected to an HMD (head-mounted display) system, this approach directly synchronizes the virtual hand (user's hand recognized by the VR device), the 3D model of the telemanipulator, and the practical telemanipulator simultaneously. The entire system was developed by integrating the previously developed master–slave system with Unity, a cross-platform game engine. In this platform, the physical slave system was converted into a virtual 3D model, and numerical optimization techniques were applied to avoid the dependency on conventional URDF (unified robot description format) applications. To verify the feasibility of this approach, several experiments were conducted, including motion consistency between the user and the robot hand, and trajectory-following performance. The rest of this paper presents the approaches for visualization of the workspace in VR. First, the pros and cons of images acquired through RGB cameras were reviewed, and then the point cloud-based 3D reconstruction approach, which was the focus of this study, was introduced. Considered methods included visualizing point clouds with the Mesh Generation Method of Unity and mapping these clouds using BAD SLAM (Bundle Adjusted Direct Simultaneous Localization and Mapping) and Open3D. Furthermore, various camera placements were tested to balance visual clarity and task efficiency, suggesting future improvements in VR visual quality and manipulation control. [ABSTRACT FROM AUTHOR]

Background/Objectives: Feelings of loneliness are common in people living with dementia (PLWD) in long-term care (LTC). The goals of this study were to describe the development of a novel virtual companion for PLWD living in LTC and assess its feasibility and acceptability. Methods: The computer-generated virtual companion, presented using a head-mounted virtual reality display, was developed in two stages. In Stage 1, the virtual companion asked questions designed to encourage conversation and reminiscence. In Stage 2, more powerful artificial intelligence tools allowed the virtual companion to engage users in nuanced discussions on any topic. PLWD in LTC tested the application at each stage to assess feasibility and acceptability. Results: Ten PLWD living in LTC participated in Stage 1 (4 men and 6 women; average 82 years old) and Stage 2 (2 men and 8 women; average 87 years old). Session lengths ranged from 0:00 to 5:30 min in Stage 1 and 0:00 to 53:50 min in Stage 2. Speech recognition issues and a limited repertoire of questions limited acceptance in Stage 1. Enhanced conversational ability in Stage 2 led to intimate and meaningful conversations with many participants. Many users found the head-mounted display heavy. There were no complaints of simulator sickness. The virtual companion was best suited to PLWD who could engage in reciprocal conversation. After Stage 2, response latency was identified as an opportunity for improvement in future versions. Conclusions: Virtual reality and artificial intelligence can be used to create a virtual companion that is acceptable and enjoyable to some PLWD living in LTC. Ongoing innovations in hardware and software will allow future iterations to provide more natural conversational interaction and an enhanced social experience. [ABSTRACT FROM AUTHOR]

Virtual reality is considered to be useful in improving procedural skills in dental education, but systems using wearable devices such as head-mounted displays (HMDs) have many problems in terms of long-term use and hygiene, and the accuracy of stereoscopic viewing at close ranges is inadequate. We developed an abutment tooth formation simulator that utilizes a display (spatial reality display—SRD) to precisely reproduce 3D space with naked-eye stereoscopic viewing at close range. The purpose of this was to develop and validate the usefulness of an abutment tooth formation simulator using an SRD. A 3D-CG (three-dimensional computer graphics) dental model that can be cut in real time was output to the SRD, and an automatic quantitative scoring function was also implemented by comparing the cutting results with exemplars. Dentists in the department of fixed prosthodontics performed cutting operations on both a 2D display-based simulator and an SRD-based simulator and conducted a 5-point rating feedback survey. Compared to the simulator that used a 2D display, the measurements of the simulator using an SRD were significantly more accurate. The SRD-based abutment tooth formation simulator received a positive technical evaluation and high dentist satisfaction (4.37), suggesting its usefulness and raising expectations regarding its future application in dental education. [ABSTRACT FROM AUTHOR]

Gait guidance systems that synchronize the gait rhythm with an avatar in a mixed reality (MR) environment are attracting attention owing to their rehabilitation applications. More effective gait guidance can be achieved by changing body sensations for the sense of embodiment (SoE), which refers to the feeling of owning, controlling, and being inside a body in MR. This study investigated full-body synchronous motion between a human and a virtual avatar to enhance the SoE in walking with actual position changes in the real world. The full-body motion and gait rhythm were measured using body-worn inertial measurement units and a visual avatar was provided through a transparent head-mounted display. The results showed that the SoE of the participants was enhanced under higher synchronization conditions. In addition, questionnaire results showed that the SoE in the synchronous condition was significantly higher than that in the asynchronous condition, and the SoE in the self-avatar condition was significantly higher than that in the other-avatar condition. This indicates that a higher synchronization level with the appearance of an avatar leads to a stronger SoE in the human perception mechanism, which is important for potential application in medical or other fields. [ABSTRACT FROM AUTHOR]

Young healthcare professionals and medical graduates often fall short in the practical experience necessary for handling medical emergencies. This can not only lead to strained feelings of inadequacy and insecurity among future physicians and less experienced healthcare providers in general, but also to detrimental outcomes for patients as emergency medicine demands rapid decision-making with low tolerance for errors. New didactic modalities and approaches may be needed to effectively address this shortcoming. Immersive technologies are powerful novel educational tools with untapped potential in medical training, and may be particularly suitable for simulation trainings in the high-stakes field of emergency medicine. Herein, we systematically explored the educational potential of extended reality (XR) technology, particularly virtual reality (VR), in the management of patients presenting as medical emergencies, combining the use of the STEP-VR application with an untethered hardware setup. Importantly, we aimed at studying multiple, large cohorts of senior medical students involving a total of 529 participants and collecting data over a period of two years. We assessed students' acceptance of the training through a modified questionnaire measuring device handling, content complexity, degree of immersion, learning success, and seminar design. Our results show high, sustained acceptance and ease of use across different student cohorts and subgroups, with most students finding XR/VR engaging and beneficial for acquiring emergency medicine skills. Importantly, the prevalence of simulation sickness was minimal. Moreover, no major effect of the head-mounted displays (HMDs) price range was noted with regard to the learning experience. The results underscore the potential of XR/VR capabilities in effectively enhancing medical education, particularly in areas of high-stakes clinical scenarios and emergency care, by providing realistic and reproducible immersive training environments. In summary, our findings suggest that XR/VR-based training approaches could significantly contribute to preparing future physicians for the complexities of emergency medical care, encouraging the integration of such technologies into medical curricula. However, careful consideration must be given to its suitability for all students and the practical challenges of its implementation, highlighting the need for further research to harness its full potential for medical education. [ABSTRACT FROM AUTHOR]

The near-eye display (NED) systems, designed to project content into the human eye, are pivotal in the realms of augmented reality (AR) and virtual reality (VR), offering users immersive experiences. A small volume is the key for a fashionable, easy-to-wear, comfortable NED system for industrial and consumer use. Freeform surfaces can significantly reduce the system volume and weight while improving the system specifications. However, great challenges still exist in further reducing the volume of near-eye display systems as there is also a limit when using only freeform optics. This paper introduces a novel method for designing compact freeform NED systems through a powerful optical-digital joint design. The method integrates a geometrical freeform optical design with deep learning of an image compensation neural network, addressing off-axis nonsymmetric structures with complex freeform surfaces. A design example is presented to demonstrate the effectiveness of the proposed method. Specifically, the volume of a freeform NED system is reduced by approximately 63% compared to the system designed by the traditional method, while still maintaining high-quality display performance. The proposed method opens a new pathway for the design of a next-generation ultra-compact NED system. [ABSTRACT FROM AUTHOR]

BACKGROUND: Standing is a basic human function that healthy adults take for granted, yet it is a complex perceptual-motor process that requires sensation of position and motion from the sensory systems. OBJECTIVE: We assessed agreement between center of pressure data from a laboratory force-platform and head position data from an HTC Vive head-mounted display (HMD) for the evaluation of standing postural control. We investigated the impact of different statistical choices when assessing the relationship between two measurements. Specifically: 1) How does correlation and agreement statistics relate before and after logarithmic transformation? 2) Is there systemic or proportional bias between the force-platform and HMD measurements? METHODS: We tested 37 adults (26 controls, 11 with unilateral vestibular hypofunction) standing on foam, observing a static or dynamic visual scene projected from the HMD. We quantified anterior-posterior and medio-lateral sway via Directional Path, Root Mean Square Velocity, Variance, and Power Spectral Density (PSD) from a force-platform and the HMD. RESULTS: Intra-class correlations (ICCs) were moderate-to-good for the non-transformed data and good-to-excellent after logarithmic transformation for all outcomes except for PSD above 1 Hz. Correlations were higher than ICCs. Bland-Altman plots indicated proportional bias but not after logarithmic transformation. CONCLUSIONS: Both devices correlated linearly, and measure people's postural responses but cannot be used interchangeably, mostly because they appear to diverge with larger sway as evident on Bland-Altman plots of non-transformed data. Agreement between devices was excellent for low frequency movement but poor for high frequency small corrective movements. [ABSTRACT FROM AUTHOR]

STUDY QUESTION Is virtual reality (VR) an effective non-pharmacological tool to reduce procedural pain during hysterosalpingography (HSG)? SUMMARY ANSWER An HSG with VR does not reduce procedural pain scores compared to an HSG without VR. WHAT IS KNOWN ALREADY An HSG is often experienced as painful and uncomfortable. VR has been proven successful to reduce acute procedural pain during a variety of medical procedures and interventions. STUDY DESIGN, SIZE, DURATION We performed a two-centre open-label randomized controlled trial between January 2021 and October 2022. PARTICIPANTS/MATERIALS, SETTING, METHODS Women scheduled for HSG as part of their infertility work-up were screened for participation. After informed consent, women were randomized between HSG with or without VR. Due to the nature of the intervention, the study was not blinded. VR was administered by a head-mounted device displaying nature movies and/or relaxation exercises. The primary endpoint was procedural pain measured using VAS (scale 0.0–10.0 cm). Procedural pain was divided into overall pain score and peak pain score during the procedure. It was measured immediately after HSG. Secondary endpoints included patient satisfaction, VR preferences, and adverse effects of VR. MAIN RESULTS AND THE ROLE OF CHANCE We included a total of 134 women, 69 to the intervention group (HSG with VR) and 65 to the control group (HSG without VR). The mean VAS for peak pain was 6.80 cm (SD 2.25) in the intervention group versus 6.60 cm (SD 2.40) in the control group (mean difference 0.28 (95% CI −0.57, 1.12), P  = 0.52). The mean VAS for overall pain was 5.00 cm (SD 2.10) in the intervention group versus 4.90 cm (SD 2.13) in the control group (mean difference 0.06 (95% CI −0.71, 0.84), P  = 0.88). The expectation that VR would be a good distraction from pain during HSG was correlated with both overall and peak pain scores. When correcting for this expectation, we found that women in the intervention group reported significantly higher scores, both in peak (adjusted MD 0.58 (95% CI −0.81, 1.97), P  = 0.021) and overall (adjusted MD 0.43 (95% CI −0.84, 1.71), P  = 0.013) pain, compared to the control group. There were no differences in the prevalence of symptoms that were considered as adverse effects of VR. LIMITATIONS, REASONS FOR CAUTION The study was not blinded. Reasons for declining participation in the study were anxiety or wanting full control during HSG, which might have created selection bias. The distraction score possibly indicates that the level of VR immersiveness was not optimal due to the lack of sound and/or the type of VR applications. Future studies should investigate whether more immersive or interactive VR applications could decrease procedural pain scores during HSG. WIDER IMPLICATIONS OF THE FINDINGS Since VR does not reduce procedural pain, this additional tool should not be used during HSG. STUDY FUNDING/COMPETING INTEREST(S) There was no external funding for this study. KR and AvH report receiving a travel grant from Merck outside the scope of this study. BM is supported by a National Health and Medical Research Council (NHMRC) investigator grant (GNT1176437) and BM reports consultancy for Merck, Organon, and Norgine and travel and research funding from Merck. BM holds stock for ObsEva. CL reports receiving research grants from Merck, and Ferring. KD and VM report receiving travel and speaker's fees from Guerbet and research grants from Guerbet. VM also reports research grants from Merck and Ferring. The remaining authors have nothing to declare. TRIAL REGISTRATION NUMBER The trial is registered prospectively in the Netherlands Trial Register (trialregister.nl registration number NL9203, currently accessible on trialsearch.who.int). TRIAL REGISTRATION DATE 16-01-2021. DATE OF FIRST PATIENT'S ENROLMENT The first participant was enrolled on 19 January 2021. [ABSTRACT FROM AUTHOR]

Teacher education has begun to embrace the use of 360 videos to improve preservice teachers' (PSTs) engagement and immersion. While recent research on such use is promising overall, there are specific questions that have been left unanswered about the construct of presence in 360 videos. More specifically, research has yet to fully explore how video delivery devices and PST characteristics may impact presence. The purpose of this study was to respond to this gap in the literature by examining PST major, delivery device (ie, head mounted display vs. flat screen), and the interaction between the two in informing presence. A total of 93 PSTs watched 360 videos and then completed a questionnaire. Findings indicated that presence in head‐mounted displays was related to emotions and agency. Conversely, presence with flat screens meant familiarity and control. Moreover, PST major was a predictor of presence, suggesting that 360 videos should be personalized according to PST career and professional goals. Finally, the interaction effect of preparing to teach K‐12 mathematics and wearing a head‐mounted display had a negative and statistically significant effect on participants' perceived presence, thus indicating a non‐cumulative effect. Practitioner notesWhat is already known about this topic 360 videos are increasingly used to support preservice teacher training.360 videos for teacher education foster immersion, presence, and noticing skills.What this paper adds Empirical evidence that 360 videos experienced with head‐mounted display facilitate agency and emotional involvement.Empirical evidence that 360 videos experienced with flat screens facilitate feelings of control.Data showed that preservice teachers' content area (math) was a positive predictor of presence in 360 videos.Implications for practice and/or policy Head‐mounted displays show promise as a delivery mode for 360 videos in teacher education.360 videos should be personalized according to PST career and professional goals.The eXtended Reality Presence Scale is confirmed as a robust instrument to measure presence in immersive environments.More research is needed to evaluate the scalability of this approach in other contexts. [ABSTRACT FROM AUTHOR]

Introduction The main goal of this study was to assess the feasibility of a head-mounted display (HMD) providing telemedicine neurosurgical support during a decompressive craniectomy by a military surgeon who is isolated from readily available neurosurgical care. The secondary aim was to assess the usability perceived by the military surgeon and to evaluate technical aspects of the head-mounted display. Materials and Methods After a standard concise lecture, 10 military surgeons performed a decompressive craniectomy on a AnubiFiX-embalmed post-mortem human head. Seven military surgeons used a HMD to receive telemedicine neurosurgical support. In the control group, three military surgeons performed a decompressive craniectomy without guidance. The performance of the decompressive craniectomy was evaluated qualitatively by the supervising neurosurgeon and quantified with the surgeons' operative performance tool. The military surgeons rated the usability of the HMD with the telehealth usability questionnaire. Results All military surgeons performed a decompressive craniectomy adequately directly after a standard concise lecture. The HMD was used to discuss potential errors and reconfirmed essential steps. The military surgeons were very satisfied with the HMD providing telemedicine neurosurgical support. Military surgeons in the control group were faster. The HMD showed no hard technical errors. Conclusions It is feasible to provide telemedicine neurosurgical support with a HMD during a decompressive craniectomy performed by a non-neurosurgically trained military surgeon. All military surgeons showed competence in performing a decompressive craniectomy after receiving a standardized concise lecture. The use of a HMD clearly demonstrated the potential to improve the quality of these neurosurgical procedures performed by military surgeons. [ABSTRACT FROM AUTHOR]

Background: In recent years, virtual reality (VR) technology has been widely used to support cancer patients with physical, emotional, and functional needs. This systematic review aimed to investigate the application of VR in the supportive care of cancer patients. Method: This systematic review was conducted in 2024. In this study, various databases including PubMed, Web of Science, Scopus, the Cochrane Library, Ovid, IEEE Xplore, and ProQuest were searched, and quantitative, qualitative, and mixed-method studies which were in English and published up to 20th May 2024 were included. The keywords consisted of "virtual reality," "supportive care," and "cancer". Studies were assessed in terms of quality and risk of bias using standard tools, and results were analyzed and reported narratively. Results: A total of 33 articles were reviewed. VR interventions, primarily using fully immersive head-mounted displays, were associated with significant reductions in anxiety, pain, and fatigue. VR also improved mood, relaxation, and overall quality of life, and some studies noted enhanced vital signs such as heart rate and blood pressure. This technology could be used along with other medical interventions. Both patients and healthcare providers reported high level of satisfaction with VR, and appreciated its ease of use and therapeutic benefits. However, some technical barriers, like inadequate visual performance and realism, were reported. Conclusion: VR demonstrates substantial potential benefits as a supportive care tool for cancer patients, effectively addressing their psychological, physiological, psychosocial needs. Despite technical challenges, high level of user satisfaction and benefits underscore the need for further research to optimize VR interventions in cancer care. [ABSTRACT FROM AUTHOR]

This study investigated the influence of using optical see-through head-mounted displays (OST-HMDs) as a replacement for conventional monitors for an extended duration, as required for laparoscopic surgery. We developed the experiment scenario including two displays (surgical field and patient vitals) in three different combinations of the HMD and conventional monitors. An experiment was conducted to compare the task performance, situation awareness, physical discomfort, and perceived workload in the three different display settings. From this study, it was shown that even though the OST-HMD resulted in higher physical discomfort and lower self-perceived performance rating, the surgical task performance, and situation awareness were not worse, and in some conditions even better than conventional monitors. The main obstacle to using OST-HMDs to replace conventional monitors in laparoscopic surgery would be the weight of the HMDs and the head discomfort caused by wearing them for a long time. [ABSTRACT FROM AUTHOR]

High-resolution displays on mobile devices, accurate motion sensors, and efficient mobile processors have taken virtual reality (VR), essentially employed in laboratory, to everyday environments, including homes, workplaces, and classrooms. Regarding programming education, it has been investigated in conjunction with various educational strategies, such as block-based programming (BBP), metaphors, and storytelling. However, studies that adopt VR predominantly employ high-end head-mounted displays (HMDs) and powerful computers to deliver interactive and immersive learning experiences. Conversely, investigations involving mobile platforms and low-cost HMDs often lack user interactivity. Towards filling that gap, this study introduces SSPOT-VR (Space Station for Programming Training in Virtual Reality), a cost-effective solution tailored for children and teenagers that integrates interactive methods for the teaching and learning of programming concepts and the simulated experience of an immersive digitally created world. Three surveys, namely S 1 , S 2 and S 3 , involving SSPOT-VR and K-12 students were conducted. S 1 and S 2 focused on user acceptance ( n 1 = 124 and n 2 = 16 ) and S 3 centered on knowledge retention ( n 3 = 31 ). The results indicate students are inclined to accept SSPOT-VR as a valuable educational tool, since it effectively facilitates the retention of programming knowledge through its engaging and interactive learning experiences. By choosing more cost-effective equipment, this research supports the existing body of knowledge while also providing a detailed description of how an effective solution is designed, developed, and used. The approach enhances both affordability and potential applications of immersive VR in programming education. [ABSTRACT FROM AUTHOR]

Sound localization is a key area of interest in auditory research, especially in complex acoustic environments. This study evaluates the impact of incorporating higher-order Ambisonics (HOA) with virtual reality (VR) and gamification tools on sound source localization. The research addresses the current limitations in VR audio systems, particularly the lack of native support for HOA in game engines like Unreal Engine (UE). A novel framework was developed, combining UE for VR graphics rendering and Max for HOA audio processing. Participants performed sound source localization tasks in two VR environments using a head-mounted display (HMD). The assessment included both horizontal and vertical plane localization. Gamification elements were introduced to improve engagement and task comprehension. Results showed significant improvements in horizontal localization accuracy, although challenges remained in back localization. The findings underscore the potential of VR and gamification to enhance auditory tests, reducing test duration and participant fatigue. This research contributes to the development of immersive and interactive audio experiences, highlighting the broader applications of VR beyond entertainment. [ABSTRACT FROM AUTHOR]

INTRODUCTION: The rapid development of virtual reality technology and the Internet of Things (IoT) has provided new possibilities for user experience, and a variety of new products have emerged, especially in the field of painting, where the combination of these two provides a new platform for innovative artistic expression. OBJECTIVES: This study takes IoT products in the art field as an example to analyze the user experience in virtual reality environments and the impact of technological innovations on IoT products, as well as to explore the potentials and limitations of this emerging form of products and forms of painting. METHODS: In this study, the author constructed a virtual reality painting environment, utilized IoT technology to collect data from the user's painting process, and combined quantitative and qualitative analysis methods to assess user experience and technological innovation comprehensively. RESULTS: In the virtual reality environment, the user experience was significantly improved, and the users were more immersed in the painting process and felt more robust creativity and expression. Meanwhile, the application of Internet of Things (IoT) technology also provides more possibilities for drawing; for example, using smartpens makes the drawing process more smooth and natural. CONCLUSION: IoT painting with user experience and technological innovation in a virtual reality environment can provide a new creative platform for artists and bring a richer artistic experience to the audience, showing the feasibility and broad prospect of IoT products based on a virtual reality environment. [ABSTRACT FROM AUTHOR]

With advancements in autonomous driving technology, the variety of activities that can be performed in a vehicle has increased. This improves the possibility of watching virtual reality (VR) content on a head-mounted display (HMD). However, unlike VR used in stationary environments, in-car VR can lead to discomfort and motion sickness due to the vehicle movements. Additionally, the obstruction of the outside view during driving may cause user anxiety. In this study, we investigated, for the first time, the effect of dynamic road environments, such as turns, stops, and speed bumps, on the in-car VR experience. Based on our findings, we included situational awareness (SA) cues in the in-car VR content to help users perceive their surroundings and improve the user experience. We conducted a user study with thirty participants to validate the impact of these cues. Consequently, we discovered that the Dynamics cue, which provides SA information while maintaining the context of the VR content, improves user immersion and trust while easing VR motion sickness. [ABSTRACT FROM AUTHOR]

Objective: We examined whether active head aiming with a Helmet Mounted Display (HMD) can draw the pilot's attention away from a primary flight task. Furthermore, we examined whether visual clutter increases this effect. Background: Head up display symbology can result in attentional tunneling, and clutter makes it difficult to identify objects. Method: Eighteen military pilots had to simultaneously perform an attitude control task while flying in clouds and a head aiming task in a fixed-base flight simulator. The former consisted of manual compensation for roll disturbances of the aircraft, while the latter consisted of keeping a moving visual target inside a small or large head-referenced circle. A "no head aiming" condition served as a baseline. Furthermore, all conditions were performed with or without visual clutter. Results: Head aiming led to deterioration of the attitude control task performance and an increase of the amount of roll-reversal errors (RREs). This was even the case when head aiming required minimal effort. Head aiming accuracy was significantly lower when the roll disturbances in the attitude control task were large compared to when they were small. Visual clutter had no effect on both tasks. Conclusion: We suggest that active head aiming of HMD symbology can cause attentional tunneling, as expressed by an increased number of RREs and less accuracy on a simultaneously performed attitude control task. Application: This study improves our understanding in the perceptual and cognitive effects of (military) HMDs, and has implications for operational use and possibly (re)design of HMDs. [ABSTRACT FROM AUTHOR]

Virtual Reality (VR) technologies have entered many aspects of daily life (e.g., workplace, education, gaming). VR users report that time flows faster when immersed in a virtual environment. Such an effect is supported by recent scientific evidence (Mullen & Davidenko, 2021). Indeed, a familiarity effect could foster such a time compression effect. To investigate this possibility, a between-subject design was adopted: in one condition, participants explored a virtual environment through a head-mounted display (HMD), whereas in the control condition, participants explored the same environment through a standard monitor. Participants were all instructed to produce an interval of 4 minutes so that longer produced durations in an interval production task were evidence of underestimation. Adopting a prospective time estimation paradigm, the time intervals produced were compared between the two conditions. Results confirmed the time compression effect: participants in the VR condition reported longer produced intervals than participants in the control condition. Furthermore, the significant interaction with levels of prior experience with VR technologies suggests that time compression effects may be more pronounced for VR newcomers, thus favoring an interpretation in terms of familiarity. The present findings provide valuable insights into the perception of time in virtual environments, suggesting the importance of continued research in this emerging technology. Limits, implications, and the need for further research are finally discussed. [ABSTRACT FROM AUTHOR]

Purpose: The aim of the article was to compare the learning outcomes of the same content in the form of a traditional analogue lesson and in the form of a virtual reality (VR) lesson with the use of head-mounted display (HMD). Design/methodology/approach: The study included one biology lesson conducted in 4 groups of a dozen people and one biology lesson in VR carried out individually on 75 people. The respondents completed the knowledge test, a questionnaire before and after the class regarding the attitude to new technologies, and feelings after the lesson. The researchers used detailed observation sheets (subjects' behaviour and the dynamics of the lesson). The obtained results were analysed statistically through lesson type (traditional/VR), respondent type (technology enthusiast/non-enthusiast) and question type. The Mann–Whitney U test, t-student and chi-squared (?²) test were used. Findings: The average of the overall results in the knowledge test was similar in both groups (16 points; ±SD 2.13), slightly better for the analogue group and for the non-enthusiast group. It was found that VR hinders the acquisition of knowledge by tech enthusiasts, who perceive it primarily in the play paradigm. However, it encourages the learning of technology sceptics, who quickly discover a passion for exploring the virtual world. It was clearly indicated, quantitatively and qualitatively, how the technology modalities directly influenced the learning outcomes. Originality/value: The article offers fresh insights into how students' perceptions of the educational process can be transformed through the integration of VR. The compelling findings and nuanced analysis provide a robust foundation for exploring new frontiers in educational technology. [ABSTRACT FROM AUTHOR]