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. 2016 Mar 22;6:23217. doi: 10.1038/srep23217

Figure 3. Grand average ERPs elicited by performing the 1-back and 2-back tasks in the high-stress exam group, low-stress exam group and non-exam group at the midline electrodes.

Figure 3

The gray areas highlight the time window for P2 (160–210 ms) that was used for the statistical analysis.