Screen Mirroring is not as Easy as it Seems: A Closer Look at Older Adults’ Cross-Device Experience Through Touch Gestures
Screen Mirroring is not as Easy as it Seems: A Closer Look at Older Adults’ Cross-Device Experience Through Touch Gestures
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屏幕镜像并不像看起来那么容易：仔细观察老年人通过触摸手势的跨设备体验
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Honglian Xiang
中科院分区：
文献类型：
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作者：
Xiwen Ouyang;Jia Zhou;Honglian Xiang
摘要屏幕镜像可能是通过智能手机改善老年人智能电视(STV)用户体验的一种方式。为了检验这种可能性，进行了两个实验。实验一考察了老年人通过五种常见的触摸手势(“拖动”、“滑动”、“缩放”、“绘制”和“手写”)进行屏幕镜像(将智能手机屏幕镜像到STV上)的困难，并与年轻人进行了比较。结果表明，老年人的一个主要问题是频繁地在STV和智能手机屏幕之间切换注意力。因此，实验二探索了如何通过触摸手势(“Tap”、“Slide+Tap”和“Slide+Release”)以及不同输入姿势的按钮大小(8、14和20 mm)来减少注意力切换的需要。30名老年人参与了这项实验，并跟踪了他们的眼球运动。得出了四个主要发现。首先，屏幕镜像中的“缩放”、“绘制”和“手写”手势对于任务完成率低于68%的老年人来说是困难的。其次，在敲击任务中，STV和智能手机之间频繁切换注意力的问题占主导地位。第三，“滑动+点击”和“滑动+释放”的触摸手势比老年人的“敲击”更有助于减少敲击任务中的注意力切换，而“滑动+释放”的主观反馈最差。第四，将智能手机上的按键尺寸从8 mm增加到14 mm，可以提高任务完成率和老年人使用单手姿势敲击时的屏幕镜像任务效率。
ABSTRACT Screen mirroring might be a way to improve older adults’ user experience of smart televisions (STVs) through smartphones. To examine this possibility, two experiments were conducted. Experiment I examined older adults’ difficulties of screen mirroring (mirroring smartphone screens to STVs) through five common touch gestures (“Drag,” “Slide,” “Zoom,” “Draw,” and “Handwrite”), in comparison to younger adults. The results indicated that a major problem for older adults is the frequent attention switching between the STV and smartphone screens. Therefore, experiment II explored how to reduce the need of attention switching through the touch gestures (“Tap,” “Slide + Tap,” and “Slide + Release”) and the button sizes (8, 14, and 20 mm) for different input postures. Thirty older adults participated in this experiment and their eye movements were tracked. Four major findings were derived. First, the “Zoom,” “Draw,” and “Handwrite” gestures in screen mirroring were difficult for older adults with a task completion rate lower than 68%. Second, the problem of frequent attention switching between the STV and smartphone was predominant for tapping tasks. Third, the “Slide + Tap” and “Slide + Release” touch gestures helped to reduce attention switching in tapping tasks more than the “Tap” for older adults, while the “Slide + Release” received the worst subjective feedback. Fourth, increasing the button size from 8 mm to 14 mm on smartphones can improve the task completion rate and the task efficiency in screen mirroring when older adults used the one-handed posture to tap.