Grand average waveforms and scalp maps.

<p>The upper panel shows global field power (GFP) curves for words (left) and faces (right). ERP waveforms at selected electrode positions are shown in the lower panel. Grey squares indicate microstate boarders, red vertical dashes in the upper panel mark difference wave peaks, and the green squares indicate time window boarders where significant mean amplitude differences between reader groups were found. Maps in the upper panel show the scalp distribution of differences waves averaged over time points in the relevant time window. The maps below represent topographical maps at ERP peaks of the grand average computed across both reader groups.