基于眼动的多目标视觉搜索绩效研究

Study on performance of multi-targets visual search based on eye movement

视觉搜索一直是人因工程领域的研究热点.为了研究在多目标视觉搜索中,目标个数对同时发现多目标现象的影响,设计3组视觉搜索实验,并在实验过程中使用眼动仪进行记录.通过眼动视频的回放和实验数据的分析可知:被试倾向于采用随机搜索策略;频繁改变搜索策略和注视点变换距离过大影响了被试的搜索过程,导致实验过程中出现的异常长的搜索时间值;随目标个数的增多,同时发现两目标的概率逐渐增加,且目标距离和搜索时间存在一定的相关关系.该研究结果能够指导实际生产中标准检测作业或安检搜索作业的制订,减少异常时间并提高搜索效率.

Visual search is always hot research field of human factors. In order to discuss target number＇s influence on find target simultaneously（FTS）, three experiments were designed, and eye track system is used for recording in the meantime. Through analysis of the playback of video data of eye movement and experiment data, the participant tends to adopt random search strategy; frequently changing search strategies and non-optimum overlap distance of fixation point impact the search process, are reasons for the extremely long search time; the probability of FTS is increasing with increasing number of targets, the relationship of target distance and search time is also found.