FACILITATION OF THE N1 PEAK OF THE AUDITORY ERP AT SHORT STIMULUS INTERVALS

EVENT-RELATED potentials (ERP) were recorded to 1 kHz tones presented at random stimulus onset asynchronies (SOA) between 100 and 1000 ms. T he Adjar correction procedure was employed to overcome waveform distor tion resulting from previous response overlap. The results showed dram atic enhancements of the N1 peak when SOA was reduced to 100-300 ms, s howing a reversal of the traditional amplitude by SOA function obtaine d by previous ERP research employing SOAs > 500 ms, and replicating si milar enhancements of the magnetic counterpart of the N1 (N100m). The results are discussed in terms of the utility of the traditional 'refr actoriness' account of the sensitivity of the N1 to SOA.