The data were recorded with a 32 Channel EEG Quick-Cap connected to a NuAmps monopolar digital amplifier (a 40-channel-EEG-ERP-amplifier, Neuroscan) and a computer running SCAN 4.5 software. Electrode positions on the Quick-Cap follow the International 10–20 system. Electrode impedances were kept below 10 kV and bandpass filtered from 0.1 to 150 Hz. Eye movements were monitored by left and right horizontal EOG channels, and the blinks were recorded by two vertical EOG electrodes (one above and the other below the left eye).
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