GestureCalc: An Eyes-Free Calculator for Touch Screens
GestureCalc: An Eyes-Free Calculator for Touch Screens
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DOI：
10.1145/3308561.3353783
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
Bindita Chaudhuri;Leah Perlmutter;Justin Petelka;Philip E. Garrison;J. Fogarty;J. Wobbrock;R. Ladner
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文献类型：
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作者：
Bindita Chaudhuri;Leah Perlmutter;Justin Petelka;Philip E. Garrison;J. Fogarty;J. Wobbrock;R. Ladner
数字计算器是最常用的触摸屏应用之一。然而，在现有的计算器应用程序中，基于键盘的字符输入需要精确的、有针对性的按键，这对许多屏幕阅读器用户来说既耗时又容易出错。我们介绍了GestureCalc，这是一个数字计算器，它使用与目标无关的手势来执行算术任务。它允许在最小音频反馈的指导下，通过一到三个手指轻击和定向滑动，实现无眼睛、无目标的数字输入和操作。我们对8名屏幕阅读器用户进行了一项混合方法的纵向研究，发现他们使用GestureCalc输入字符的速度比使用典型的触摸屏计算器平均快40.5%。参与者犯了更多的错误，但也纠正了更多的错误使用GestureCalc，导致错误计算比基线减少了52.2%。在这项研究的三个阶段中，参与者能够学习GestureCalc手势并有效地进行简短计算。从我们第二次会议后的采访中，参与者承认了学习一套新手势的努力，但报告了他们对自己在练习中变得流利的能力的信心。
A digital calculator is one of the most frequently used touch screen applications. However, keypad-based character input in existing calculator applications requires precise, targeted key presses that are time-consuming and error-prone for many screen readers users. We introduce GestureCalc, a digital calculator that uses target-free gestures for arithmetic tasks. It allows eyes-free target-less input of digits and operations through taps and directional swipes with one to three fingers, guided by minimal audio feedback. We conducted a mixed methods longitudinal study with eight screen reader users and found that they entered characters with GestureCalc 40.5% faster on average than with a typical touch screen calculator. Participants made more mistakes but also corrected more errors with GestureCalc, resulting in 52.2% fewer erroneous calculations than the baseline. Over the three sessions in the study, participants were able to learn the GestureCalc gestures and efficiently perform short calculations. From our interviews after the second session, participants recognized the effort in learning a new gesture set, yet reported confidence in their ability to become fluent in practice.