A Grass model 12A Neurodata Acquisition System recorded the EEG. Impedances were kept below 5 kΩ. Data were recorded at a sampling rate of 256 Hz during the ERP task and 128 Hz for the resting EEG, and filtered from 0.01 – 30 Hz (half-amplitude, 6 dB/octave rolloff) for both tasks. ERP task data were recorded from three parietal electrodes: on the midline at Pz, and over left and right hemispheres at P3 and P4, respectively, referenced to linked earlobes. Resting EEG was recorded using a bipolar montage from parietal-occipital sites, O1-P7 and O2-P8, over left and right hemispheres, respectively, and monopolarly, referenced to linked earlobes, from central-midline electrode Cz. Additionally, during both tasks, electrooculographic (EOG; used to screen for eye movement artifacts) data were recorded using a pair of biopotential electrodes arranged in a transverse montage, one electrode placed superior to the eye and the other at the outer canthus.
