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

Table 2

Eye-tracking metrics acquired for AOI-1 in all scenes.

AOI-1	Eye-tracking metrics	High SA		Low SA		Permutation results
		Mean	Std.	Mean	Std.	Welch’s t	-value
Scene 1	Fixation count	8.835	1.127	15.571	1.235	2.413	0.043^b
	Fixation duration	14.327	1.614	21.366	2.386	0.463	0.626
	Saccade count	4.946	4.089	11.306	1.370	1.484	0.164
	Saccade duration	0.704	0.338	0.716	0.303	2.145	0.079^a
	Pupil diameter	4.437	0.860	4.329	1.179	1.574	0.425
Scene 2	Fixation count	14.044	3.485	23.354	2.437	2.675	0.035^b
	Fixation duration	16.649	3.939	23.124	1.425	2.687	0.034^b
	Saccade count	6.913	4.382	13.212	1.549	1.054	0.266
	Saccade duration	0.512	0.168	0.559	0.090	1.375	0.339
	Pupil diameter	3.899	0.633	4.422	1.107	0.537	0.704
Scene 3	Fixation count	16.239	4.466	23.905	2.936	2.363	0.034^b
	Fixation duration	23.726	1.976	27.961	2.436	2.075	0.043^b
	Saccade count	6.964	3.399	14.445	3.816	1.934	0.086^a
	Saccade duration	0.471	0.297	0.826	0.434	1.454	0.347
	Pupil diameter	4.435	0.756	4.591	1.124	0.865	0.697
Scene 4	Fixation count	19.096	1.063	15.042	2.171	2.776	0.024^b
	Fixation duration	26.28	2.915	19.595	3.456	2.462	0.036^b
	Saccade count	0.445	0.323	0.674	0.334	1.817	0.075^a
	Saccade duration	0.449	0.322	0.674	0.332	2.475	0.050^b
	Pupil diameter	4.214	0.775	4.356	1.096	−0.183	0.849
Scene 5	Fixation count	6.922	2.775	16.993	1.654	1.078	0.237
	Fixation duration	5.314	1.282	11.416	1.844	1.873	0.092^a
	Saccade count	4.846	4.19	12.082	2.677	1.923	0.087^a
	Saccade duration	0.646	0.291	0.726	0.258	1.621	0.343
	Pupil diameter	4.035	0.748	4.221	1.143	0.964	0.694

^a<0.1, ^b < 0.05.