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ERP norming study: Effects of lexical association. Displayed on the left are ERP waveforms to the target words in the unrelated (red) and the related (blue) conditions. In this figure and all other figures, waveforms are shown for 9 electrodes over central, parietal and posterior electrode sites. Negative voltage is plotted upward. Displayed on the right is a topographic map showing the scalp distribution of the N400 effect (unrelated – related) in the 300-500ms time window.
