The Brain Vision Analyzer package (BVA, Brain Products, Munich, Germany) was utilized for processing of ERPs. Artifacts were removed using the Gratton and Coles method implemented in BVA (Gratton et al., 1983). Data were then band-pass filtered between 0.5 and 10 Hz using a zero-phase lag filter at 48 dB/octave. Within the time window from 200 to 500 ms (covering the N2-P3 complex), 0.5 – 10 Hz accounts for approximately 95% evoked power in the full bandwidth recordings. Stimulus-locked trials were extracted for all instances where there was a correct behavioral response for the target and rare non-target experimental conditions, with each trial comprising 100ms of data pre-stimulus and 750ms post-stimulus. The trials were baseline corrected using the 100ms pre-stimulus interval. Any trials with out of range voltages (± 75 mV) were rejected as artifact and excluded from further processing. If any subject had less than 20 trials per condition (target and rare non-target), that subject was eliminated from the analysis. On this basis, 10 TNAD and 5 NAC subjects were eliminated, leaving 76 TNAD (33 women and 43 men) and 65 NAC (28 women and 37 men) for further analyses (these are the subjects included in the various tables).
