Fig. 3

Eye movement data during the recognition phase. a The two representative eye movement patterns discovered using EMHMM during face recognition: In each pattern, the ellipses show ROIs as 2-D Gaussian emissions. Priors in the table show the probabilities that a fixation sequence starts from the ellipse. The table also shows transition probabilities among the ROIs. The smaller image on the top-right shows the assignment of actual fixations to different ROIs. The assignment of fixations to the ROIs was based on the ROI sequence with the largest posterior probability given the fixation sequence. The smaller image on the bottom-right shows the corresponding heatmap. Note that ROI 5 (Cyan) in both patterns captures outlier fixations that do not belong to other ROIs. b Eye movement pattern measured in A–B scale in different mask conditions. c Eye gaze transition consistency from the first fixation to the second fixation as measured in conditional entropy. d Eye gaze transition consistency from the second fixation to the third fixation as measured in conditional entropy (*p < .05, ** p < .01, ***p < .001, paired t test)