Disrupted Moral Judgment under induced anxiety

Using a NeuroScan system, we continuously recorded EEG signals from 64 electrodes at 1000 Hz, using the left mastoid as the online reference, ensuring scalp impedance was below 5 kΩ. The signals were bandpass filtered online from 0.01 to 100 Hz. For offline analysis, we used the EEGLAB toolbox in Matlab to re-reference the data to the average of both mastoids and adjust the filter to 0.1 to 30 Hz. We extracted segments from 200 ms pre- and 1200 ms post-stimulus, excluding shock trials. Before the ICA, artifacts were manually rejected by an experienced researcher. After that, automatically excluding any with amplitudes exceeding ±100 μV. Missing participants were excluded due to excessive artifacts in their EEG data (fewer than 75% of trials remaining for analysis). Data from 36 participants (16 males; mean age: 20.14 ± 2.22 years [mean ± standard deviation]) were included in the final analysis.