Waveforms show cross-participant grand-average waveforms pooled over frontal (left: (F3, F5, F7, AF7), midline: (F1, F2, Fz), right: (F4, F6, F8, AF8)), central (left: (C3, C5, T7), midline: (C1, Cz, C2), right: (C2, C4, T8)) and parietal (left: (P3, P5, P7, PO7), midline: (P1, Pz, P2, POz), right: (P4, P6, P8, PO8)) electrode clusters. The 3 conditions included are Target Hits (items studied in the targeted task attracting correct ‘target’ responses), Non-target CR (items studied in the non-targeted task attracting correct ‘non-target’ responses), and New CR (novel items attracting correct ‘non-target’ responses). Positive-going ERPs are plotted upwards. See ERP results section for details of analysis.