Flanker task
In the experimental task, subjects were required to focus on the “+” sign in the middle of the screen to indicate the start of the task. This is followed by a sequence of five letter combinations according to the letters that appear on the screen for 1000 ms, with the gaze point being the position where the middle arrow is located and the stimulus interval being 1 s. This string of letters may appear as follows: congruent conditions, such as “FFFFFF” and “LLLLLL”; incongruent conditions, such as “LLFLL” and “FFLLFF.” The experiment required the subjects to respond to the middle letter as quickly and correctly as possible by pressing the “F” key on the keyboard with the index finger if it was an “F” and the “L” key if it was an “L.” The two conditions were presented equally and randomly, and the formal test consisted of 2 sections, each of which required 60 judgments and 12 practice sessions before the formal test.