2.3.2. Apparatus and EEG Recordings
The EEG experiment was conducted in an electrically-shielded, quiet, and
dimly-lit room. Participants were seated about 60 cm away from the
computer monitor. The experimental procedure was implemented in E-Prime
3.0 software (Psychology Software Tools, USA). Using conductive gel, the
EEG signal was recorded from 64 active electrodes, placed according to
the 10-10 system in a BrainProducts actiCap; impedances were kept below
10 kΩ. The electrodes were connected to a BrainProducts actiChamp
amplifier; sampling rate was 1 kHz; no online filtering or active noise
canceling was applied. Online reference was the Cz electrode, and
bipolar recording of AFz versus the outer canthus of the left eye served
as EOG channel.