دانلود رایگان مقاله لاتین شبیه ساز قدرت صندلی چرخدار از سایت الزویر
عنوان فارسی مقاله:
عوامل موثر بر غوطه وری ادراک و رفتار در یک شبیه ساز قدرت صندلی چرخدار واقعیت مجازی
عنوان انگلیسی مقاله:
Immersion factors affecting perception and behaviour in a virtual reality power wheelchair simulator
سال انتشار : 2017
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مقدمه انگلیسی مقاله:
1. Introduction
Previous research has shown that virtual-reality-based applications are in increasingly wide-spread use for such tasks as driving. Driving simulators are used for, but not limited to, assessment, learning, rehabilitation, and entertainment (Wilson, 1999). One representative and exemplary class of such driving simulators are power (electrical) wheelchair (PWC) simulators (Cooper et al., 2005). They provide a risk-free environment that would allow users to drive efficiently in order to evaluate their ability at PWC driving. Despite their potential, existing PWC simulators have been found to be less usable than demanded and expected (Alshaer et al., 2013). While previous research could show positive transfer effects from the virtual simulator to the real world, the users experienced difficulties in operating the simulator attributed to immersion factors like display characteristics (Harrison et al., 2002; Archambault et al., 2012). In addition, the use of Virtual Reality personal computer (PC) technology, i.e. interactive 3D desktop computer systems, for PWC simulation seems to be underdeveloped and under-researched. Only one software product is commercially available on the market: WheelSim (Abellard et al., 2010), unfortunately unsuitable for training and assessment (Alshaer et al., 2013). To close this gap in the availability of a suitable research platform for the investigation of design factors for this class of Virtual Reality (VR) simulators we developed a simple, but usable power wheelchair simulator which can be operated with different peripheral devices and can be configured to meet the needs of our research. We conducted initial interviews with professional experts (four occupational therapists) and consulted the appropriate literature, e.g. (Alshaer et al., 2013; Kjeldskov, 2001; Harrison et al., 2000; Pithon et al., 2009) leading to the identification of system requirements. For instance, the ability of the users to drive accurately depends on how they perceive the scale of the space of the virtual environment (VE), which is a prerequisite for the validity as a training and/or assessment tool. Another example is that the presentation of a self-avatar (a visual representation of the user’s own body or body parts) in VEs in general has been shown to not only increase the sense of presence but also to improve size and distance judgments (Schultze, 2010). There is evidence (Ries et al., 2008; Lim and Reeves, 2009; Dodds et al., 2011) that a self-avatar could serve as a familiar size cue that provides scaling information and act as a frame of reference in the VE. Sun et al. (Sun et al., 2015) add that the presence aspect of the user’s body can lead to significant effects on performance. In a PWC simulator, the visualisation of the virtual PWC itself would also provide scaling information about the dimensions of the virtual space and act as a usable frame of reference for spatial judgments. In this study we add an additional question: Would the self-avatar provide additional cues and serve as a dual reference. It is well researched that misperceptions of a simulation space can result in erroneous judgments that could alter the user’s behaviour (H et al., 2010; Henry and Furness, 1993). Therefore, it is important not only to measure users’ perception but also to differentiate behaviour. However, how to best measure the accuracy of space perception in VEs remains a difficult question (Geuss et al., 2010). Research in the past used verbal estimation, perceptually direct actions, and imagined action to estimate perceived distance in a VE (Rebillat et al., 2012 ). In verbal estimation, perceived distance assessed through familiar units, such as meters. In perceptually direct actions, subjects would preform an action, such as blind walking or imagined action (Rebillat et al., 2012 ) (Geuss et al., 2010), which only provide rather indirect measures. In 1979, Gibson (Gibson, 2014) introduced the concept of “affordance” which emphasizes the relationship between objects and their observers. For instance, a gap can afford passage if it is wide enough for the user. Many studies, since then, have demonstrated the practicality and usefulness of using affordance theory to measure user perceptions in VE (Mark, 1987) (Warren and Whang, 1987). According to Geuss et al. (Geuss et al., 2010), “affordance judgments may be especially useful as a perceptual measure of size in graphic displays because they require the user to see the space in terms of their own ability to act and therefore may be considered more task-relevant”. In our research presented here we use the affordance of “pass-ability” though wall-openings to measure perceived spatial size and distance.
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کلمات کلیدی:
Driving performance in a power wheelchair simulator: Disability and ... www.tandfonline.com/doi/abs/10.3109/17483107.2011.625072 by PS Archambault - 2012 - Cited by 24 - Related articles Purpose: A power wheelchair simulator can allow users to safely experience various ... Keywords:: driving skills, driving strategies, presence, virtual reality ... [PDF]Electric Wheelchair Navigation Simulators: why, when ... - InTechOpen cdn.intechopen.com/.../InTech-Electric_wheelchair_navigation_simulators_why_whe... by P Abellard - Cited by 16 - Related articles Mar 1, 2010 - 2.2 Virtual Electric Power Wheelchair Driving: Pittsburgh University .... This project also proposes the use of virtual reality to improve spatial perception ..... performance and user behaviour on optimal models evaluation and ... Immersion factors affecting perception and behaviour in a virtual ... citeweb.info/20170000414 {{cite web | title=Immersion factors affecting perception and behaviour in a virtual reality power wheelchair simulator | year=2017 ... Powered wheelchair simulator development: implementing combined ... https://jneuroengrehab.biomedcentral.com/articles/10.1186/s12984-016-0112-2 by G Tao - 2016 - Cited by 2 - Related articles Jan 19, 2016 - Task analysis showed most of navigation and reaching behaviours as having ... Virtual reality Powered wheelchair Training Reaching Navigation Rehabilitation ...... The lack of haptic feedback and depth perception in our study likely .... Boissy P. Driving performance in a power wheelchair simulator. Disabil ... Real and Illusory Interactions Enhance Presence in Virtual Environments www.mitpressjournals.org › List of Issues by H Regenbrecht - 2002 - Cited by 130 - Related articles It has long been argued that the possibility to interact in and with a virtual ... affecting perception and behaviour in a virtual reality power wheelchair simulator. Virtual Reality: Recent Advances in Virtual Rehabilitation System Design https://www.novapublishers.com/catalog/product_info.php?products_id=62075... In recent years, humanity has seen a trend towards the use of virtual reality (VR) ... in a Power Wheelchair Simulator (Abdulaziz Alshaer, MSc, David O'Hare, PhD, ... Interaction Technique on Perception and Behaviour in Mobile Virtual Reality ... The 11th International Conference on Disability, Virtual Reality and ... centaur.reading.ac.uk/66645/8/ICDVRAT2016_Full_Proceedings_11th%20_Conf.pdf by P Sharkey - 2016 - Related articles Sep 22, 2016 - Disability, Virtual Reality & Associated Technologies .... 73 Influence of navigation interaction technique on perception and behaviour in mobile virtual ...... Virtual reality-based power wheelchair simulators can help potential ...
