基于NNI注视指数的塔台管制员情境意识研究

Study of Tower Controllers' Situation Awareness Based on NNI Fixation Index

为研究塔台管制员在任务不同阶段的注视模式与情境意识(situation Awareness,SA)的关系,搭建模拟塔台管制的眼动试验平台,设计3组不同难度的试验,用NASA-TLX量表评估被试的任务负荷,利用方差分析方法验证试验难度设计的合理性;利用3D-SART量表评估被试的SA水平,利用NNI算法分别计算和识别试验前期和后期被试的注视模式,并结合操作绩效,分析不同任务难度下管制员前期和后期的NNI注视指数与SA的关系。结果表明,被试在试验后期的NNI注视指数受试验难度的影响更为显著,且试验后期NNI注视模式呈离散型分布的被试具有更高的SA水平和操作绩效。

To study the relationship between the tower controller＇ s SA and their fixation mode at different stages of the task, an eye-tracking experiment platform to simulate the tower control was built. Three group experiments of varying task difficulty were designed, and NASA-TLX scale was utilized to evaluate the subjects＇ workload. Through variance analysis, the result showed that the experiments designed were validated be reasonable. 3 D-SART scale was utilized to evaluate the subjects＇ SA, and NNI algorithm was utilized to calculate and identify the sub- jects＇ fixation mode at pre-and post-experiment stage. Combined with operation performance, the relationship anal- ysis of pre-and post-NNI fixation index and SA under different task difficulty were carried out. Results reveal that post-NNI fixation index was affected more post-NNI fixation index showed a discrete significantly by varying experiment difficulty, and the subjects whose distribution have higher levels of SA and better operational performance