激发点击的不同注视时间参数对眼控交互操作绩效的影响

The Influence of Fixation Time Parameter of Activated Clicks on Eye-Controlled Interaction Operation Performance

目的在基于注视作为激发点击的眼控交互中,考察激发点击的不同注视时间(300ms、500ms、700ms、900ms)参数对任务操作绩效的影响,确定适宜的时间参数推荐值。方法 16名被试分别完成4种注视时间水平下的数字搜索并选中点击任务,采用任务完成率、任务完成时为指标比较不同注视时间水平下的绩效差异。结果 (1)如果把任务超时和误击均作为操作失败,任务完成率随注视时间的增加显著提升,当注视时间达到700ms后,不再发生显著的变化;如果仅以任务超时作为操作失败,则任务完成率在不同注视时间水平下均没有显著差异;(2)任务完成时随注视时间的增加显著增长,当注视时间达到500ms后,趋于稳定,不再发生显著的变化。结论综合考虑注视时间对任务完成率和任务完成时指标的影响,在基于注视作为激发点击的眼控交互中,700ms是适宜的参数推荐值。

Objective In the eye - controlled interaction that based on fixation activate click, we compare the influence of different fixation time（300ms, 500ms, 700ms, 900ms） with activate clicks on the operating performance in the task to determine the appropriate fixation time parameters for recommendation. Methods 16 subjects separately completed the task of number search and click to confirmation under four different levels of fixation time, and compared the operation performances of task completion rate and task completion time. Results （1）In consideration of the timeout and mistake click, the increase of the fixation time significandy improves the task completion rate, while after the fixation time reaches 700ms, The task completion rate has no significant change. If timeout is the only consideration, the task completion rate has no significant difference in all levels of fixation time. （2）the increase of the fixation time significantly increases the task completion time, while after the fixation time reaches 500ms, the task completion time becomes steady and has no significant change. Conclusion From the perspective of the influence of fixation time on the task completion rate and task completion time, In the eye - controlled interaction based on fixation activate click, the 700ms is an appropriate parameter value recommend.