Stereoscopic Views Improve Spatial Presence but not Spatial Learning in VR Games

A key affordance of virtual reality is the capability of immersive VR to prompt spatial presence resulting from the stereoscopic lenses in the head mounted display (HMD). We investigated the effect of a stereoscopic view of a game, Cellverse, on users' perceived spatial presence, knowledge of cells, and learning in three levels of spatial knowledge: route, landmark, and survey knowledge. Fifty-one participants played the game using the same game controllers but with different views; 28 had a stereoscopic view (HMD), and 23 had a non-stereoscopic view (computer monitor). Participants explored a diseased cell for clues to diagnose the disease type and recommend a therapy. We gathered surveys, drawings, and spatial tasks conducted in the game environment to gauge learning. Participants' spatial knowledge of the cell environment and knowledge of cell concepts improved after gameplay in both conditions. Spatial presence scores in the stereoscopic condition were higher than the non-stereoscopic condition with a large effect size, however there was no significant difference in levels of spatial knowledge between the two groups. Most all drawings showed a change in cell knowledge, yet some participants only changed in spatial knowledge of the cell, and some changed in both cell knowledge and spatial knowledge. Evidence suggests that a stereoscopic view has a significant effect on users' experience of spatial presence, but that increased presence does not directly translate into spatial learning.

Knowledge and Perceptions of the Health Impacts of Climate Change Among Canadians

Background At a time of intersecting public health crises of COVID-19 and climate change, understanding public perceptions of the health risks of climate change is critical to inform risk communication and support the adoption of adaptive behaviours. In Canada, very few studies have explored public understandings and perceptions of climate impacts on health. Methods This study addresses this gap through a nationally-representative survey of Canadians (n=3,014) to explore public perceptions and awareness regarding the link between climate change and health in Canada. The 116-question survey measured awareness of the link between climate change and health, affective assessment of climate health impacts, unprompted knowledge of climate health impacts, and concern about a range of impacts. Kruskal-Wallis tests were used to test for differences in median values among sociodemographic groups. The survey also measured baseline climate opinion, which was used to segment the public into different audiences through a latent class analysis.Results Three climate opinion classes were identified in the sample (disengaged, concerned, and alarmed) and perceptions of climate health impacts were compared across these classes and other sociodemographic variables. Approximately half (53%) of respondents have considerable awareness of the link between climate change and health, and even more (61%) perceive climate change as bad for health. The majority of respondents (58%) can name one or more health impact without prompting. Concern about health impacts of climate change is highest among the alarmed and lowest among the disengaged, as compared to concerns about other categories of climate impacts such as economic. Across the survey, knowledge and concern are highest for water- and food-related health impacts.Conclusions The differential knowledge, awareness, and concern of climate health impacts across segments of the Canadian population can inform targeted communication and engagement to build broader support for adaptation and mitigation measures.

Knowledge of General Practitioners Regarding Some Fundamental Aspects of H. Pylori Infection in a Developing Country

Objective: This study was conducted to assess the level of knowledge of Pakistani GPs regarding various aspects of H. pylori. Methodology: This cross-sectional survey was carried out all over Pakistan from July to December 2019. Close-ended questionnaires were distributed to a convenience sample of 150 GPs and were requested to answer questions on demographics, importance, diagnosis, treatment and complications of H. pylori. The analysis of the data was done by SPSS version 20.0. Results: The mean age of all GPs was 42.6±8.2 years and females were in majority 53.8%. Most of the respondents 73.1% were graduates, 56.3% worked in clinics and 43.7% in Hospitals. Regarding the knowledge of various aspects of H. pylori, 45.4% to 58% positive responses were obtained to different questions. lowest score 45.4% was obtained regarding the question of whether H. pylori constitutes an important public health problem and highest score 58% on the question regarding the infectious nature of peptic ulcer disease. There was little correlation between demographic and professional features of GPs and knowledge about H. pylori. Conclusion: It was observed that the knowledge of most Pakistani GPs is only modest about H. pylori. There is a need of increasing awareness and educating GPs about this important pathogen. Key Words: general practitioners, H. pylori, questionnaire, survey, knowledge.

Overcoming navigational challenges: A novel approach to the study and assessment of topographical orientation

Several studies investigating environmental navigation require participants to navigate in virtual environments, in which the proprioceptive and vestibular components present during real environmental navigation are lost. Here, we aimed to provide a novel computerized ecological navigational battery, investigating whether the absence of proprioceptive and vestibular inputs yields a representation of the navigational space comparable to that acquired ecologically. In Study 1, 38 participants underwent two sets of tasks, one performed in a laboratory-based setting (LBS) and the other in an ecological environment (EE), with both including evaluation of route, landmark, and survey knowledge and a landmark ordering task. All tasks, except the route task, significantly correlated between EE and LBS. In LBS, performance in the landmark ordering task was predicted by that in the survey task, but not by those in the route and landmark tasks. Results of Study 1 were replicated in Study 2, in which 44 participants completed a modified and shorter online version of LBS tests. Reliability of the online LBS tests was also tested and showed a moderate-to-high internal consistency. Overall, results show that the conditions in which tasks are performed affect the acquisition of route knowledge, likely due to the lack of proprioceptive and vestibular information in LBS. However, LBS tasks presented here provide a standard battery of tests that can overcome the replicability problems encountered by ecological navigation tests, while taking into consideration all the complexities of navigational processes in terms of the use of landmark, route, and survey strategies.

Endocrine Elective Primer for Medical Students

Background: Endocrine modules available online have shown improvement in student learning and increased student satisfaction with self-guided learning (Kirk, 2016). However, most available modules are geared towards preclinical medical students rather than clinical students. Therefore, we developed an endocrine primer, defined as a set of introductory preparatory material, in the form of a PowerPoint. The primer reviews commonly seen endocrine disorders in adults, including their presentation, diagnosis, and management, in order to offer students access to self-paced learning and help bridge the gap between the basic science curriculum and clinical experience. Methods: Third and fourth year medical students enrolled in the endocrine elective from Feb 2020-Oct 2020 completed a 15 question pre-and post-knowledge assessment, as well as an endocrine primer satisfaction survey. The knowledge assessments evaluated students’ knowledge of topics surrounding type 1 and 2 diabetes, hyper- and hypothyroidism, thyroid nodules, adrenal and pituitary disease, hyperparathyroidism, and osteoporosis. The pre-knowledge assessment was completed prior to starting the endocrine elective and viewing the endocrine primer. The post-knowledge assessment was completed at the end of the two or four week endocrine elective. Results: A paired-T test was used to compare the pre- and post-knowledge survey results. A total of 7 third- and fourth-year medical students completed the knowledge assessment and satisfaction survey. Knowledge results showed a nonsignificant mean improvement of 1.4 points, p=0.09, from the start of the elective to completion, with a decreased variability between student scores. Student satisfaction was high, with 100% of students who completed the primer agreeing it made them more prepared for the endocrine elective and all students recommending other electives create similar primers as well. Conclusion: The endocrine primer standardized students’ endocrinology knowledge and enhanced satisfaction with the endocrinology elective. This self-paced learning opportunity was well received by medical students and should be included in other clinical electives. This pilot study will be expanded to a larger sample size and incorporate internal medicine residents on the endocrinology elective. We also plan to review faculty satisfaction before and after the primer was initiated.

Echolocation as a Means for People with Visual Impairment (PVI) to Acquire Spatial Knowledge of Virtual Space

In virtual environments, spatial information is communicated visually. This prevents people with visual impairment (PVI) from accessing such spaces. In this article, we investigate whether echolocation could be used as a tool to convey spatial information by answering the following research questions: What features of virtual space can be perceived by PVI through the use of echolocation? How does active echolocation support PVI in acquiring spatial knowledge of a virtual space? And what are PVI’s opinions regarding the use of echolocation to acquire landmark and survey knowledge of virtual space? To answer these questions, we conducted a two-part within-subjects experiment with 12 people who were blind or had a visual impairment and found that size and materials of rooms and 90-degree turns were detectable through echolocation, participants preferred using echoes derived from footsteps rather than from artificial sound pulses, and echolocation supported the acquisition of mental maps of a virtual space. Ultimately, we propose that appropriately designed echolocation in virtual environments improves understanding of spatial information and access to digital games for PVI.