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.