Effect of Emergency Icon Presentation and Brightness Contrast on Cognitive Performance
The cognitive performance of emergency icons plays an important role in emergency rescue.In order to investigate the mechanism of the effect of changes in emergency icon presentation mode and luminance contrast on cognitive performance,a visual search paradigm was adopted and an eye movement experiment was used to validate the results.The results of experiment A show that under high and medium loads,the main effect of emergency icon presentation mode and luminance contrast is obvious,the search speed of reverse-colour emergency icons is significantly faster than that of graphic emergency icons and emergency icons with borders,the average reaction time of search in luminance contrast of 0.90 is the shortest,and the average reaction time of 0.10,0.30 and 0.60 has a tendency to decrease with the increase of luminance contrast.The average reaction time of emergency icon presentation mode and luminance contrast has no significant effect on cognitive performance under low loads.The results of the eye movement experiment in experiment B show that under high and medium loads,the gaze time of the reverse-colour contingency icons is significantly lower than that of the other presentation modes,and the mean gaze time of the contingency icons with a border with a higher luminance contrast(0.90)is significantly lower than that of the low luminance contrast,with a tendency for the gaze time to decrease with the increase of the contrast.There is no significant difference in the gaze time of the icon presentation modes and luminance contrasts under the low loads.There is no significant difference in the number of gaze points under high,medium,and low loads,explaining the results of experiment A.Subjective ratings also provide cognitive explanations for the experimental results.The contingency icon presentation style and luminance contrast have a significant effect on cognitive performance.
万方数据
维普
