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. 2021 Jan 8;11:588253. doi: 10.3389/fpsyg.2020.588253

FIGURE 4.

FIGURE 4

Time-on-task effect on N200 for letter stimuli during the 32-min time load dual back task in the frontal and central regions. ** and ***: Significantly time-on-task effect (p < 0.01 and p < 0.001, respectively).