Correlation Evaluation of Pilots’ Situation Awareness in Bridge Simulations via Eye-Tracking Technology

Table 3

Eye-tracking metrics acquired for AOI-2 in all scenes.

AOI-2	Eye-tracking metrics	High SA		Low SA		Permutation results
		Mean	Std.	Mean	Std.	Welch’s t	-value
Scene 1	Fixation count	18.465	6.694	6.378	2.875	2.236	0.038^b
	Fixation duration	17.318	7.874	4.299	1.806	0.531	0.677
	Saccade count	9.489	5.121	11.241	2.447	0.751	0.526
	Saccade duration	0.546	0.306	0.808	0.188	2.214	0.040^b
	Pupil diameter	4.324	0.867	4.391	1.276	-0.161	0.888
Scene 2	Fixation count	14.226	2.986	4.776	2.971	2.486	0.027^b
	Fixation duration	13.066	5.919	2.984	2.044	2.195	0.033^b
	Saccade count	9.974	4.894	10.510	1.050	1.452	0.293
	Saccade duration	0.559	0.274	0.687	0.044	1.746	0.098^a
	Pupil diameter	3.876	0.576	4.171	1.177	0.715	0.537
Scene 3	Fixation count	24.943	4.373	15.664	1.943	2.263	0.032^b
	Fixation duration	25.599	6.601	14.867	4.013	2.353	0.014^b
	Saccade count	17.186	8.003	15.891	1.904	1.856	0.054^a
	Saccade duration	0.895	0.336	0.889	0.083	1.782	0.075^a
	Pupil diameter	4.369	0.843	4.556	1.189	0.382	0.692
Scene 4	Fixation count	19.911	7.567	5.282	3.674	2.337	0.034^b
	Fixation duration	17.563	10.156	3.476	2.899	2.149	0.047^b
	Saccade count	13.404	8.256	14.216	1.606	1.996	0.390
	Saccade duration	0.724	0.339	0.723	0.315	2.353	0.042^b
	Pupil diameter	4.214	0.826	4.348	1.144	-0.306	0.803
Scene 5	Fixation count	15.202	3.116	5.566	2.426	1.626	0.086^a
	Fixation duration	15.654	4.739	7.893	2.454	1.221	0.298
	Saccade count	10.141	5.284	11.214	2.589	1.369	0.236
	Saccade duration	0.769	0.284	0.684	0.244	1.294	0.396
	Pupil diameter	3.934	0.737	4.222	1.073	0.425	0.618

^a<0.1, ^b < 0.05.