Use of an Indoor Navigation System by Sighted and Blind Travelers: Performance Similarities across Visual Status and Age
Use of an Indoor Navigation System by Sighted and Blind Travelers: Performance Similarities across Visual Status and Age
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DOI：
10.1145/3407191
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发表时间：
2020-08-01
影响因子：
2.4
通讯作者：
Cioffi, Joseph F.
中科院分区：
文献类型：
--
作者：
Giudice, Nicholas A.;Guenther, Benjamin A.;Cioffi, Joseph F.
本文首先回顾了当前无障碍室内导航系统的优缺点，然后描述了一项使用商业智能设备在复杂建筑中导航路线的研究。我们的兴趣是比较性能时，使用实时叙事描述（系统辅助条件）与基于记忆的条件下，相同的叙事信息只提供给用户从路线的起源。我们测试了两组盲人和视力受损（BVI）用户，包括60岁以上和60岁以下的人，以及第三个视力正常的对照组。评估老年BVI参与者很重要，因为大多数视力丧失与年龄有关，但很少研究使用接入技术的导航性能。行为的结果表明，访问实时（系统辅助）信息导致更好的导航精度和更大的信心，盲人用户相比，信息匹配的记忆条件。60岁以上的盲人参与者的表现几乎与年轻人相同，这是一个重要的结果，支持了快速增长的人群使用导航技术的有效性。路线完成的准确性和援助的请求没有可靠的盲人和视力正常的参与者之间的差异时，使用该系统，这表明访问叙事路线信息导致功能等效的导航行为，无论视觉状态。调查结果显示，用户对实时信息的支持很强，并为今后改进界面提供了重要指导。
This article first reviews the pros and cons of current accessible indoor navigation systems and then describes a study using commercial smart devices to navigate routes through a complex building. Our interest was in comparing performance when using real-time narrative descriptions (system-aided condition) vs. a memory-based condition where the same narrative information was only provided to users from the route's origin. We tested two groups of blind and visually impaired (BVI) users, including people above and below 60 years of age, as well as a third sighted control group. Evaluating older BVI participants is important, as the majority of vision loss is age-related, yet navigation performance using access technology is rarely studied with this demographic. Behavioral results demonstrated that access to real-time (system-aided) information led to better navigation accuracy and greater confidence by blind users compared to the information-matched memory condition. Performance for blind participants over 60 years old was nearly identical with their younger peers-an important outcome supporting the efficacy of using navigational technologies by this fast-growing population. Route completion accuracy and requests for assistance did not reliably differ between blind and sighted participants when using the system, suggesting that access to narrative route information led to functionally equivalent navigation behavior, irrespective of visual status. Survey results revealed strong user support for real-time information and provided important guidance for future interface refinements.