Kang Hwayeong, Shin Gwanseob
Department of Human Factors Engineering, School of Design and Human Engineering, Ulsan National Institute of Science and Technology, South Korea.
Department of Human Factors Engineering, School of Design and Human Engineering, Ulsan National Institute of Science and Technology, South Korea.
Appl Ergon. 2017 May;61:159-167. doi: 10.1016/j.apergo.2017.01.015. Epub 2017 Feb 7.
Touchscreen interfaces for computers are known to cause greater physical stress compared to traditional computer interfaces. The objective of this study was to evaluate how physical demands and task performance of a tap gesture on a computer touchscreen vary between target locations and display positions. Twenty-three healthy participants conducted reach-tap-return trials with touch targets at fifteen locations in three display positions. Mean completion time, touch accuracy and electromyography of the shoulder and neck extensor muscles were compared between the target locations and display positions. The results demonstrated that participants completed the trial 12%-27% faster with 13%-39% less muscle activity when interacting with targets in the lower area of the display compared to when tapping upper targets (p < 0.05). The findings suggest that proper target placement and display positioning can improve task performance and lessen physical demands of computer touchscreen interface use.
众所周知，与传统计算机界面相比，计算机触摸屏界面会造成更大的身体压力。本研究的目的是评估计算机触摸屏上点击手势的身体需求和任务表现如何因目标位置和显示位置的不同而变化。23名健康参与者在三个显示位置的15个位置进行了触摸目标的伸手点击返回试验。比较了目标位置和显示位置之间的平均完成时间、触摸准确性以及肩部和颈部伸肌的肌电图。结果表明，与点击上方目标相比，参与者在与显示屏下部区域的目标交互时，完成试验的速度快12%-27%，肌肉活动减少13%-39%（p<0.05）。研究结果表明，正确的目标放置和显示定位可以提高任务表现，并减少使用计算机触摸屏界面时的身体需求。
