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ERP waveforms at Pz electrode. (A) Mean ERP curve for 0-back level. (B) Mean ERP curve for 1-back level. (C) Mean ERP curve for 2-back level. (D) Mean ERP curves at all workload levels. Light vertical line is onset of Flanker stimulus, dark vertical lines indicate time window for mean P300 amplitude calculation (250–500 ms post-stimulus onset).
