Figure 2.

Left panel. Transition matrix: The diagonal contains zeros because by definition a transition is a saccade from one AOI to another. In this example there are 5 transitions from AOI nr 3 to AOI number 1. Right panel. The black cells in A_net describe the net transitions. The positive number in the third row, second column of A_net denotes 2 transitions from AOI nr 3 to AOI nr 2. The negative number in the second row, first column denotes one transition from AOI nr 1 to AOI nr 2 (negative number reverses the direction). The black cells in A_total describe the total number of transitions between three AOIs.