Figure 1.

Drawing from the simplified RCFT and an illustration of eye-tracking metrics. (A) Modified figure from previous publication (39). The simplified RCFT was shown on a tablet computer (size = 12 in, resolution = 2,160 x 1,440, Samsung Galaxy Book 12, Samsung Electronics, Suwon, Korea) with a screen width of 162 mm and a screen height of 258 mm. The upper half was defined as the “perceptual space,” and the lower half was defined as the “working space.” The simplified Rey figure presented in the perceptual space was 152 mm in width and 95 mm in height. The left, right, and upper margins were 30 mm. The blue text, markers, and background colors were not presented to the participants. (B) An illustration of the eye movements made by a normal individual while drawing the simplified RCFT for 15 s. We measured three indices from the eye movements: (1) fixations, (2) saccades, and (3) switches between the two AOIs. The purple circles indicate fixations, and the size of each circle indicates the duration of the fixation. The purple lines connecting the fixations indicate saccades. The red lines across the blue perceptual space and red working space indicate switches between the two spaces. AOI, area of interest; RCFT, Rey–Osterrieth complex figure test.