Table 5.

The pairwise comparions of fixation duration parameter between asymmetry groups in lower lip-chin AOI

Amount of asymmetry		Mean Difference	Standard Error	p	95% Confidence Interval
					Lower	Upper
0 mm	2 mm	−0.004	0.007	1.000	−0.025	0.017
	4 mm	−0.009	0.007	1.000	−0.030	0.011
	6 mm	−0.011	0.009	1.000	−0.037	0.015
	8 mm	−0.029	0.010	0.064	−0.060	0.001
2 mm	4 mm	−0.005	0.008	1.000	−0.029	0.018
	6 mm	−0.007	0.009	1.000	−0.033	0.019
	8 mm	−0.026	0.010	0.112	−0.054	0.003
4 mm	6 mm	−0.002	0.009	1.000	−0.027	0.024
	8 mm	−0.020	0.009	0.270	−0.046	0.006
6 mm	8 mm	− 0.0019	0.006	0.030	−0.036	−0.001

Fixation Duration refers to the total time the gaze remained on a particular AOI, calculated as a percentage of the total trial duration. It indicates how long the participant visually focused on that region relative to the entire viewing period