FIGURE 2.

Experimental design of the n‐back tasks. This task was composed of 4 blocks for the 0‐back condition, 4 blocks for the 1‐back condition, and 4 blocks for the rest condition (a total of 12 blocks). Each block consisted of eight trials, lasting a total of 32 s, preceded by instruction lasting 4 s. In the 0‐back task, participants were instructed to respond when the displayed face stimuli disappeared. In the 1‐back task, participants were asked to monitor a series of stimuli and to indicate whether the stimulus was the same as the one presented 1‐trial prior. In the rest condition, participants were instructed to maintain their attention on a fixation cross in the middle of screen. s, second