IRBM ( IF 5.6 ) Pub Date : 2020-10-08 , DOI: 10.1016/j.irbm.2020.10.003 D.T.G. Mariano 1 , Y. Morére 2 , P. Pino 2 , A.A.R. de Sá 1 , E.L.M. Naves 1
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Purpose
Scanning switch keypads are commonly used as augmentative and alternative communication aids for people with complex communication needs. Low communication rates and high error rates are some of the problems that users of scanned keyboards encounter in daily use, which could lead to the abandonment of this type of technology. Thus, this study presents a new configuration system for scanned keyboards using visual feedback recovery time to help the user have a better performance and experience when using this type of alternative communication.
Methods
The system was developed in C#. The control switch is realized by means of a wireless USB mouse button. In order to evaluate the system, 42 participants transcribed sentences using a system based on our recovery delay approach, as well as a second time-delay-free scanning system for comparison purposes. We analyzed the input rate, success rate, and probability of error occurrence. These data were used to compare the performance of the two types of systems.
Results
The results showed that synchronization and selection errors were lower in the group that used the system with a recovery delay than in the group that used the layout without.
Conclusion
The error reduction provided by the recovery delay system, allows for a more stable and enjoyable user experience when using scanned keyboards to communicate. This contribution could improve the use of augmentative and alternative communication devices and therefore contribute to reducing the abandonment of this type of technology.
中文翻译：
具有视觉反馈的恢复延迟可减少单开关扫描键盘中的错误
目的
扫描开关键盘通常用作具有复杂通信需求的人的辅助和替代通信辅助工具。低通信率和高错误率是扫描键盘的用户在日常使用中遇到的一些问题，这可能导致这种技术的放弃。因此，本研究提出了一种新的扫描键盘配置系统，使用视觉反馈恢复时间来帮助用户在使用这种类型的替代通信时获得更好的性能和体验。
方法
该系统是用C#开发的。控制开关通过无线USB鼠标按键实现。为了评估该系统，42 名参与者使用基于我们的恢复延迟方法的系统以及用于比较目的的第二个无时间延迟扫描系统转录句子。我们分析了输入率、成功率和错误发生的概率。这些数据用于比较两种系统的性能。
结果
结果表明，使用具有恢复延迟的系统的组中的同步和选择错误低于使用不使用布局的组。
结论
恢复延迟系统提供的错误减少，允许在使用扫描键盘进行通信时获得更稳定和愉快的用户体验。这种贡献可以改善增强和替代通信设备的使用，因此有助于减少对此类技术的放弃。
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