Colle Herbert, Hiszem Keith
Department of Psychology, Wright State University, Dayton, OH 45435, USA.
Ergonomics. 2004 Oct 22;47(13):1406-23. doi: 10.1080/00140130410001724228.
Touch screen input keys compete with other information for limited screen space. The present study estimated the smallest key size that would not degrade performance or user satisfaction. Twenty participants used finger touches to enter one, four or 10 digits in a numeric keypad displayed on a capacitive touch screen, while standing in front of a touch screen kiosk. Key size (10, 15, 20, 25 mm square) and edge-to-edge key spacing (1, 3 mm) were factorially combined. Performance was evaluated with response time and errors, and user preferences were obtained. Spacing had no measurable effects. Entry times were longer and errors were higher for smaller key sizes, but no significant differences were found between key sizes of 20 and 25 mm. Participants also preferred 20 mm keys to smaller keys, and they were indifferent between 20 and 25 mm keys. Therefore, a key size of 20 mm was found to be sufficiently large for land-on key entry.
触摸屏输入键会与其他信息争夺有限的屏幕空间。本研究估算了不会降低操作性能或用户满意度的最小按键尺寸。20名参与者站在触摸屏信息亭前，通过手指触摸在电容式触摸屏上显示的数字小键盘中输入1位、4位或10位数字。按键尺寸（边长为10、15、20、25毫米）和按键之间的边缘间距（1、3毫米）进行了析因组合。通过响应时间和错误率评估操作性能，并获取用户偏好。间距没有可测量的影响。较小的按键尺寸输入时间更长且错误率更高，但20毫米和25毫米的按键尺寸之间未发现显著差异。参与者也更喜欢20毫米的按键而非更小的按键，对于20毫米和25毫米的按键他们没有偏好。因此，发现20毫米的按键尺寸对于按键着陆输入来说足够大。
