Fig. 2

Eye movement data during face learning. a The two representative eye movement patterns discovered using EMHMM during face learning: In each pattern, 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. b Eye movement pattern measured in A–B scale in the unmasked and masked conditions during face learning