Presence最新文献_第5页

Problematizing Realism: Confronting Colonial Perspectives and Engaging Complexities of Landscape Through “Ghost Textures” 有问题的现实主义：通过“幽灵纹理”直面殖民主义视角并介入复杂的景观

Presence Pub Date : 2021-12-01 DOI: 10.1162/pres_a_00370

Aidan Ackerman;Christopher Koudelka;Paul Hirsch;Owen Zaengle

引用次数: 2

A Virtual Reality Embodiment Technique to Enhance Helping Behavior of Police Toward a Victim of Police Racial Aggression 虚拟现实体现技术增强警察对警察种族侵犯受害者的帮助行为

Presence Pub Date : 2021-10-29 DOI: 10.1162/pres_a_00339

Sameer Kishore;Bernhard Spanlang;Guillermo Iruretagoyena;Shivashankar Halan;Dalila Szostak;Mel Slater

引用次数: 0

Assessment of a Short, Focused Training to Reduce Symptoms of Cybersickness 评估减少网络病症状的短期集中训练

Presence Pub Date : 2021-02-23 DOI: 10.1162/pres_a_00335

Cristian E. Preciado;Michael J. Starrett;Arne D. Ekstrom

{"title":"Assessment of a Short, Focused Training to Reduce Symptoms of Cybersickness","authors":"Cristian E. Preciado;Michael J. Starrett;Arne D. Ekstrom","doi":"10.1162/pres_a_00335","DOIUrl":"https://doi.org/10.1162/pres_a_00335","url":null,"abstract":"<para>Past reports have suggested that active visual training in virtual reality (VR) can reduce symptoms of cybersickness. Here, we adapted such a protocol to a computer-based version and compared it with a passive exposure control condition. We employed heart rate and other subjective predictors of cybersickness to try to predict the efficacy of the intervention as well as likelihood of drop out. While we found a significant decrease in heart rate across sessions, the intervention we employed did not appear to be effective at reducing cybersickness or dropout. However, a heart rate increase of 15.5 bpm from baseline, nausea self-report of 4.5 on a scale of 1–10, and dizziness self-report of 5.5 on a scale of 1–10 predicted an equal probability of experiment dropout, independent of whether participants were in the experimental or control intervention condition. Our findings suggest that a single immersion of visual training in VR or passive VR exposure may not be sufficient to provide adaptation for VR. At the same time, our findings bolster past reports suggesting the value of employing heart rate monitoring, rather than subjective reports, to monitor the onset of cybersickness.</para>","PeriodicalId":101038,"journal":{"name":"Presence","volume":"27 4","pages":"361-377"},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50206608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Higher-Order Approximation to the Guidewire Model Used in Simulators of Cardiac Catheterization and Multiple Segment Relaxations 用于心脏导管和多节段松弛模拟器的导丝模型的高阶近似

Presence Pub Date : 2021-02-23 DOI: 10.1162/pres_a_00334

Jürgen A. Baier-Saip;Pablo A. Baier;Jauvane C. Oliveira;Herbert Baier

{"title":"Higher-Order Approximation to the Guidewire Model Used in Simulators of Cardiac Catheterization and Multiple Segment Relaxations","authors":"Jürgen A. Baier-Saip;Pablo A. Baier;Jauvane C. Oliveira;Herbert Baier","doi":"10.1162/pres_a_00334","DOIUrl":"https://doi.org/10.1162/pres_a_00334","url":null,"abstract":"<para>Cardiac catheterism is important because it offers many advantages in comparison to open surgery, for example, fewer injuries, lower risk of infections, and shorter recovery times. Simulators play a fundamental role in training packages, and virtual learning environments are less stressful. Moreover, they can also be used in certification boards and in performance assessments. A realistic and interactive simulator must be fast. In this work, the physical model of the guidewire used in catheter simulations has been improved. In particular, we determined a simple analytic expression to calculate the direction of a guidewire segment, which minimizes the total energy. The surface energy resulting from the guidewire--artery interaction and the bending energy of the guidewire is approximated up to the second order, which gives rise to interactions between segments. Furthermore, the multiple segment relaxations are introduced, enhancing the convergence especially at the beginning of the relaxation cycle. The formulas are written in matrix form of dimension <inline-formula><mml:math><mml:mrow><mml:mn>4</mml:mn><mml:mi>M</mml:mi><mml:mo>×</mml:mo><mml:mn>4</mml:mn><mml:mi>M</mml:mi></mml:mrow></mml:math></inline-formula>, where <inline-formula><mml:math><mml:mi>M</mml:mi></mml:math></inline-formula> represents the number of segments varied in the update step. The method results in a more stable static solution.</para>","PeriodicalId":101038,"journal":{"name":"Presence","volume":"27 4","pages":"333-360"},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50206607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Presence Questionnaires in Driving Simulation 驾驶模拟中的存在性问卷

Presence Pub Date : 2020-12-01 DOI: 10.1162/pres_a_00372

Chantal Himmels;Teresa Rock;Joost Venrooij;Andreas Riener

{"title":"Presence Questionnaires in Driving Simulation","authors":"Chantal Himmels;Teresa Rock;Joost Venrooij;Andreas Riener","doi":"10.1162/pres_a_00372","DOIUrl":"https://doi.org/10.1162/pres_a_00372","url":null,"abstract":"Abstract Automotive research often takes place in driving simulators, where a high sense of feeling present in the virtual traffic situation has been hypothesized to foster a realistic driving behavior. Presence in driving simulators has been investigated using subjective questionnaires, but their validity for application in driving simulators has not yet been verified. In a first approach, we aimed at critically investigating whether presence questionnaires can or cannot be applied in driving simulation. Therefore, we conducted a within-subjects experiment with N=50 participants comparing presence between a low- and a high-fidelity simulator, using two commonly used questionnaires: the Igroup Presence Questionnaire (IPQ) and the Slater-Usoh-Steed (SUS*) presence questionnaire. The wording of the SUS* questionnaire has been adopted for use in driving simulation prior to its use in the study. Results show a strong correlation between the adapted SUS* questionnaire and the IPQ. Both questionnaires reflected a significant difference in presence between the low-fidelity and the high-fidelity simulator. The reliability of both questionnaires was acceptable (Cronbach's alpha > .7). The present results are promising in that presence questionnaires, including in particular the adapted SUS* and the IPQ, can be used in driving simulation. The validity of the adapted SUS* questionnaire should be further investigated.","PeriodicalId":101038,"journal":{"name":"Presence","volume":"29 ","pages":"261-275"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50326616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Identification of Visual Functional Thresholds for Immersion Assessment in Virtual Reality 虚拟现实中沉浸式评估的视觉功能阈值识别

Presence Pub Date : 2020-12-01 DOI: 10.1162/pres_a_00354

Maxence Hébert-Lavoie;Philippe Doyon-Poulin;Benoît Ozell

引用次数: 1

What Do We Mean When We Say “Presence”? 我们说“在场”是什么意思？

Presence Pub Date : 2020-12-01 DOI: 10.1162/pres_a_00360

Dooley Murphy;Richard Skarbez

{"title":"What Do We Mean When We Say “Presence”?","authors":"Dooley Murphy;Richard Skarbez","doi":"10.1162/pres_a_00360","DOIUrl":"https://doi.org/10.1162/pres_a_00360","url":null,"abstract":"Abstract Characterizations of presence are many and various. The first part of this article applies philosophical and psychological lenses to three common descriptions: Presence as (or as following from) “the suspension of disbelief,” presence as the “illusion of nonmediation,” and presence as “(the feeling of) being there.” These construals of presence—the assumptions and commitments they make—are compared with one another, their plausibility and utility appraised. The second, shorter part of the article is not so much interested in definitions as distinctions that may help us ask better questions moving forward. We briefly consider the role of attention in presence, whether, when, or how presence is “binary,” and whether it is helpful to speak of presence in unmediated physical reality. A recurring theme throughout the article is whether a given understanding of presence (mis)construes the mind as monolithic: That is, as uniformly rational and consciously accessible. In closing, we suggest that researchers specify precisely what type of presence they're referring to whenever the concept is evoked; and that states such as involvement, absorption, and engagement be kept conceptually separate from presence, since they speak to “higher” cognitive functioning than simply feeling self-located in virtual environments, and indeed need not presuppose placeness or spatiality at all.","PeriodicalId":101038,"journal":{"name":"Presence","volume":"29 ","pages":"171-190"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50326622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Quantifiable Framework for Describing Immersion 一个描述浸入的量化框架

Presence Pub Date : 2020-12-01 DOI: 10.1162/pres_a_00361

Wil J. Norton;Jacob Sauer;David Gerhard

引用次数: 0

A Live Speech-Driven Avatar-Mediated Three-Party Telepresence System: Design and Evaluation 一个以虚拟形象为媒介的三方直播系统的设计与评价

Presence Pub Date : 2020-12-01 DOI: 10.1162/pres_a_00358

Aobo Jin;Qixin Deng;Zhigang Deng

引用次数: 2

Virtual Environment Presentations: A Qualitative Exploration of User Perceptions 虚拟环境演示：用户感知的定性探索

Presence Pub Date : 2020-12-01 DOI: 10.1162/pres_a_00367

Luke LeFebvre;Leah E. LeFebvre;Mike Allen

{"title":"Virtual Environment Presentations: A Qualitative Exploration of User Perceptions","authors":"Luke LeFebvre;Leah E. LeFebvre;Mike Allen","doi":"10.1162/pres_a_00367","DOIUrl":"https://doi.org/10.1162/pres_a_00367","url":null,"abstract":"Abstract This exploratory study investigates virtual environments (VEs) as a treatment intervention for the fear of public speaking (FoPS). Prior preliminary studies indicate fear reduction following VE simulations with few investigations examining participants’ perspectives. Participants (N = 17) recruited from a public speaking course participated in a virtual reality 360° digital recording simulation that carbon copied the physical reality of their classroom and audience. Before and after immersion, participants completed open-ended responses about the simulation, pre- and post-public speaking fears, and VE public speaking experience. Using thematic analysis on the open-ended responses, researchers coded the responses to understand the communicative performance experience surrounding their VE public speaking simulation. Negative-valence emotions occurred for both presentations; however, participants expressed value in experiencing and overcoming the negative feelings. Based on the anecdotal (or clinical) findings, participants reported experiencing fears similar to those experienced in physical reality as well as emotional and behavioral interventions when engaged in the VE. Additionally, a one-year follow-up (N = 6) provided a reflective process for participants to recall their VE experience and implications beyond the physical simulation. These open-ended responses offered implications surrounding emotional reaction, real audiences, and the speechmaking process. The findings suggest mitigation of audience-related fears by the presence of the virtual audience with participants reoriented to focus on execution of speech delivery. This exploratory qualitative investigation builds toward a future of optimal strategies for using instructional technologies to improve public speaking competency.","PeriodicalId":101038,"journal":{"name":"Presence","volume":"29 ","pages":"241-259"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50326615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0