Figure 1.

Data preprocessing method.

Note. A. The Gaussian filter (sd. = 10) was applied to the recorded gaze data every 1 Hz. B. The filtered data within the same session were superimposed, and the weight of the gaze data was then calculated. C. An individualized face mask was applied to the weight data to extract the weight of each area. D. The weight of each area was divided by the size of the corresponding area (pixels count), and the weight of the one-pixel unit for each part was calculated. (The above numbers are examples, not actual results).