ASSIST: Evaluating the usability and performance of an indoor navigation assistant for blind and visually impaired people
ASSIST: Evaluating the usability and performance of an indoor navigation assistant for blind and visually impaired people
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DOI：
10.1080/10400435.2020.1809553
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发表时间：
2020-09-02
影响因子：
1.8
通讯作者：
Zhu, Zhigang
中科院分区：
文献类型：
--
作者：
Nair, Vishnu;Olmschenk, Greg;Zhu, Zhigang
本文介绍了一款室内导航应用ASSIST的界面和测试，该应用可以高精度地引导盲人和视障人士在室内环境中行走，同时增强他们对周围环境的理解。ASSIST通过考虑英属维尔京群岛居民在室内寻路方面的独特体验，提供了个性化的界面，并提供了多层次的多模式反馈。在概述了ASSIST系统的技术方法和第一个原型的实现之后，介绍了对英属维尔京群岛个人进行的两项试点研究的结果——一项是收集使用该应用程序时的移动性数据（步行速度、碰撞和导航错误）的性能研究，另一项是收集用户对感知的有用性、安全性、易用性、易用性和其他方面的评估数据的可用性研究。我们的研究表明，ASSIST在为用户提供导航指导、提高他们的效率以及（更重要的）室内寻路的安全性和准确性方面很有用。Finy -55的研究结果和用户反馈证实了之前的一些结果，同时也为创建这样一个应用程序提供了一些新的见解，包括使用定制的用户界面和扩展所提供的信息类型。
This paper describes the interface and testing of an indoor navigation app - ASSIST - that guides blind & visually impaired (BVI) individuals through an indoor environment with high accuracy while augmenting their understanding of the surrounding environment. ASSIST features personalized interfaces by considering the unique experiences that BVI individuals have in indoor wayfinding and offers multiple levels of multimodal feedback. After an overview of the technical approach and implementation of the first prototype of the ASSIST system, the results of two pilot studies performed with BVI individuals are presented - a performance study to collect data on mobility (walking speed, collisions, and navigation errors) while using the app, and a usability study to collect user evaluation data on the perceived helpfulness, safety, ease-of-use, and overall experience while using the app. Our studies show that ASSIST is useful in providing users with navigational guidance, improving their efficiency and (more significantly) their safety and accuracy in wayfinding indoors. Finy -55dings and user feedback from the studies confirm some of the previous results, while also providing some new insights into the creation of such an app, including the use of customized user interfaces and expanding the types of information provided.