| uditory event-related potentials (ERPs) were examined in 48 subjects between 3-, 4-, and 5-years-old (n = 16, 18, and 14, respectively). The study attempted to: (a) document the ontogeny of the N1-P2-N2-P3 complex; (b) establish a profile of auditory ERPs and apply a uniform measurement system; (c) delineate the trajectory of auditory ERPs in the Ignore condition; (d) examine the developmental "status" of the nontask P3; and (e) compare the nontask P3 with the oft-reported, task-related P3b. A nontask "oddball" paradigm was used (based on p =.3 for 2 kHz Rare and p =.7 for 500 Hz Common tones). Active sites included Fz, Cz, Pz and one EOG lead. No more than 20 Rare tones were averaged per subject.;Key findings showed that application of peak-to-peak ERP minima of 40 ms and 4... |
