Abstract：In order to research the influence of auxiliary words on safety signs' recognition, Eyelink Ⅱ eye tracker was used to record the experimental data for average saccade amplitude and average fixation duration, in the case of the safety signs' images as a stimulant and the auxiliary words as the controlling factor. The relative data of 8 safety signs were recorded via Eyelink Ⅱ and were analyzed via the statistics method of 10 participants. The results show that: both average saccade amplitude and average fixation duration can be used as quantitative measurements to the visual cognitive workload and as an assessment criteria for the difficulty of safety signs' recognition, and the significance and feasibility of applying eye movement technique to the study of safety signs' recognition were analyzed; the average saccade amplitude and average fixation duration were significantly affected by auxiliary words; adding auxiliary words could reduce visual cognitive workload as well as the difficulty of identifying safety signs.

Keyword：eye movement technique;safety signs;recognition;auxiliary text;visual cognitive workload;