Electrophysiological data recorded to the second word of the prime-antonym pair (n = 50; primed) and the unrelated word (word not preceded by its antonym; n = 50; unprimed) were averaged to produce mean waveforms of primed and unprimed words for each subject. The N4 component was selected as the largest negative peak between 300 to 500 ms and occurring before the large positive component after the stimulus onset in averaged waveforms for each subject and condition; its peak amplitude and latency values were extracted using a semi-automatic peak-picking program. This study focused on assessing differences that were previously noted in alcoholics namely, between primed and unprimed words.
