Trace Center, University of Wisconsin-Madison, USA.
Appl Ergon. 2012 Nov;43(6):1038-43. doi: 10.1016/j.apergo.2012.03.003. Epub 2012 Apr 6.
Touch screens are becoming more prevalent in everyday environments. Therefore, it is important that this technology is accessible to those with varying disabilities. The objective of the current study was to evaluate performance and touch characteristics (forces, impulses, and dwell times) of individuals with and without a movement disorder during a reciprocal tapping touch screen task. Thirty-seven participants with a motor control disability and 15 non-disabled participants participated. Outcome measures include number of correct taps, dwell time, exerted force, and impulse. Results indicate non-disabled participants had 1.8 more taps than participants with fine motor control disabilities and 2.8 times more than those with gross motor impairments (p<0.05). Additionally, people with gross motor control disabilities demonstrated longer dwell times and greater impulses (p<0.05). The average force used to activate the buttons was 6.2 N, although the button activation force was 0.98 N. Differences in reciprocal tapping and touch characteristics exist between those with and without motor control disabilities. Understanding how people (including those with disabilities) interact with touch screens may allow designers and engineers to ultimately improve usability of touch screen technology.
触摸屏在日常生活环境中越来越普及。因此，对于那些有各种残疾的人来说，这项技术能够方便他们使用是非常重要的。本研究的目的是评估在交互点击触摸屏任务中，运动障碍者和非运动障碍者的表现和触摸特征（力、冲量和停留时间）。共有 37 名运动控制障碍者和 15 名非残疾参与者参加了这项研究。研究结果包括正确点击次数、停留时间、施加力和冲量。结果表明，非运动障碍者的点击次数比精细运动控制障碍者多 1.8 次，比粗大运动障碍者多 2.8 次（p<0.05）。此外，运动控制障碍者的停留时间更长，冲量更大（p<0.05）。激活按钮的平均力为 6.2N，而按钮激活力为 0.98N。运动控制障碍者和非运动障碍者之间在交互点击和触摸特征方面存在差异。了解人们（包括残疾人）与触摸屏的交互方式可能使设计师和工程师最终能够提高触摸屏技术的可用性。
