A Performance Evaluation of Nomon: A Flexible Interface for Noisy Single-Switch Users
A Performance Evaluation of Nomon: A Flexible Interface for Noisy Single-Switch Users
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DOI：
10.1145/3491102.3517738
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发表时间：
2022-04
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影响因子：
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通讯作者：
Nicholas Bonaker;Emli-Mari Nel;K. Vertanen;Tamara Broderick
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文献类型：
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作者：
Nicholas Bonaker;Emli-Mari Nel;K. Vertanen;Tamara Broderick
一些有运动障碍的人使用单个开关进行交流，例如单击按钮、吹气或眨眼。行列扫描提供了一种使用单个开关选择排列在网格中的项目的方法。另一种方法是 Nomon，它允许任意排列潜在的选择，而不需要网格（如游戏、绘画等所需），并提供另一种概率选择方法。虽然过去的结果表明，Nomon 可能比行列扫描更快、更容易使用，但目前还没有任何工作能够量化这两种方法在较长时间段或超出书写的任务中的性能。在本文中，我们还开发并验证了一种基于网络摄像头的开关，该开关允许没有运动障碍的用户近似于运动障碍的单个开关用户的响应时间；尽管近似值不能替代单开关用户的测试，但它使我们能够更好地初始化、校准和评估我们的方法。通过超过 10 次使用网络摄像头开关的会话，我们发现用户使用 Nomon 打字比使用行列扫描更快、更轻松。 Nomon 的优势在图片选择任务中表现得更加明显。来自运动障碍开关用户的评估和反馈进一步支持了 Nomon 的承诺。
Some individuals with motor impairments communicate using a single switch — such as a button click, air puff, or blink. Row-column scanning provides a method for choosing items arranged in a grid using a single switch. An alternative, Nomon, allows potential selections to be arranged arbitrarily rather than requiring a grid (as desired for gaming, drawing, etc.) — and provides an alternative probabilistic selection method. While past results suggest that Nomon may be faster and easier to use than row-column scanning, no work has yet quantified performance of the two methods over longer time periods or in tasks beyond writing. In this paper, we also develop and validate a webcam-based switch that allows a user without a motor impairment to approximate the response times of a motor-impaired single switch user; although the approximation is not a replacement for testing with single-switch users, it allows us to better initialize, calibrate, and evaluate our method. Over 10 sessions with the webcam switch, we found users typed faster and more easily with Nomon than with row-column scanning. The benefits of Nomon were even more pronounced in a picture-selection task. Evaluation and feedback from a motor-impaired switch user further supports the promise of Nomon.