A total of seven cases (1.6%) were dropped as a result of automatic processing. Five additional cases (1.2%) were dropped because visual inspection (by a trained psychophysiologist) of averaged ERPs indicated irreparable drift in the vast majority of trial-epochs. This resulted in 410 (94.5 %) cases of analyzable EEGs with an average of 69.6 (SD = 10.4) artifact-free trials per subject.
