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Event-related potential waveforms and topographic maps for basic memory effects. (A) Grand-averaged ERP waveforms for R hits, K hits, and CRs. (B) Topographic maps for FN400 (K hits minus CRs at 300–500 ms) and LPC (R hits minus K hits at 500–800 ms) for old/new effects. F, frontal electrode cluster; P, parietal electrode cluster.
