Observational and experimental investigation of typing behaviour using virtual keyboards for mobile devices
Observational and experimental investigation of typing behaviour using virtual keyboards for mobile devices
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DOI：
10.1145/2207676.2208658
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发表时间：
2012-05
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影响因子：
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通讯作者：
N. Henze;E. Rukzio;Susanne CJ Boll
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文献类型：
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作者：
N. Henze;E. Rukzio;Susanne CJ Boll
随着当前智能手机的兴起，触摸屏虚拟键盘成为主要的移动文本输入技术。我们开发了一款打字游戏，记录用户如何触摸标准 Android 键盘，以调查用户的打字行为。通过发布该游戏，我们收集了 72,945 次安装中的 47,770,625 次击键。通过可视化触摸分布，我们确定了系统偏差，并导出了一个通过移动触摸事件来补偿这种偏差的函数。通过更新游戏，我们进行了一项实验，研究移动触摸事件、更改按键标签以及可视化触摸位置的效果。基于 6,603,659 次击键和 13,013 次安装的结果表明，使用简单的点可视化触摸位置可将 Android 键盘的错误率降低 18.3%，但速度也会降低 5.2%，但对可学习性没有积极影响。 Android键盘的性能优于控制条件，但构造的shift函数进一步将性能提高了2.2%，并将错误率降低了9.1%。我们认为换档功能可以免费改进现有键盘。
With the rise of current smartphones, virtual keyboards for touchscreens became the dominant mobile text entry technique. We developed a typing game that records how users touch on the standard Android keyboard to investigate users' typing behaviour. 47,770,625 keystrokes from 72,945 installations have been collected by publishing the game. By visualizing the touch distribution we identified a systematic skew and derived a function that compensates this skew by shifting touch events. By updating the game we conduct an experiment that investigates the effect of shifting touch events, changing the keys' labels, and visualizing the touched position. Results based on 6,603,659 keystrokes and 13,013 installations show that visualizing the touched positions using a simple dot decreases the error rate of the Android keyboard by 18.3% but also decreases the speed by 5.2% with no positive effect on learnability. The Android keyboard outperforms the control condition but the constructed shift function further improves the performance by 2.2% and decreases the error rate by 9.1%. We argue that the shift function can improve existing keyboards at no costs.