An Experimental Investigation into Wayfinding Directions for Visually Impaired People
An Experimental Investigation into Wayfinding Directions for Visually Impaired People
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DOI：
10.1007/s00779-005-0350-y
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发表时间：
2005-11-01
影响因子：
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通讯作者：
Dunlop, Mark D.
中科院分区：
文献类型：
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作者：
Bradley, Nicholas A.;Dunlop, Mark D.
近年来，针对视障人士的定向和寻路技术和系统不断升级。然而，这些技术进步并没有与人机交互的适当研究相匹配。G.为形成不同导航认知图的人设计导航辅助工具）。本研究的目的是调查是否一组视力正常的参与者和一组视力受损的参与者的经验，在精神和身体的需求时，给予两套不同的口头指示，引导他们到四个地标的差异。第一组指令的内容与来自视力正常的人的路线描述成比例，第二组与来自视力受损的人的描述成比例。客观评估包括测量参与者到达地标所需的时间以及发生的偏差数量。美国宇航局的任务负荷指数问卷提供了一个指示参与者的主观感受的工作量。结果显示，视障人士形成的指令导致较低的加权工作量评分，较小的偏差，以及视障参与者的更快时间。相比之下，这些指令被发现会导致视力正常的参与者获得更高的加权工作量分数。讨论结果有关的问题，个性化的移动的上下文感知系统的视障人士。
In recent years, there has been an escalation of orientation and wayfinding technologies and systems for visually impaired people. These technological advancements, however, have not been matched by a suitable investigation of human-computer interaction ( e. g. designing navigation aids for people who form different cognitive maps for navigation). The aim of this study is to investigate whether a group of sighted participants and a group of visually impaired participants experience a difference in mental and physical demands when given two different sets of verbal instructions directing them to four landmarks. The content of the first set of instructions was proportioned to route descriptions derived from sighted people, and the second set proportioned to descriptions derived from visually impaired people. The objective assessment involved measuring the time taken by participants to reach landmarks and the number of deviations that occurred. A NASA-Task Load Index questionnaire provided an indication of participants subjective perception of workload. The results revealed that instructions formed from visually impaired people resulted in a lower weighted workload score, less minor deviations, and quicker times for visually impaired participants. In contrast, these instructions were found to cause a higher weighted workload score for sighted participants. The results are discussed in relation to the issue of personalisation of mobile context-aware systems for visually impaired people.