| Abstrakt: |
Latency and amplitude functions for the P300 component of the slow auditory evoked potential were measured for 20 normal hearing adults. Stimuli consisted of digitized numbers, 1-10 (excluding 7), of 480-ms duration. The method of presentation for stimuli pairs was in an oddball paradigm in which the frequently occurring digit was presented 80% of the time and the rarely occurring digit 20% of the time. Pairs consisted of acoustically similar or acoustically divergent waveforms (e.g., 4-5 vs 8-2, respectively). Evoked potentials were recorded from Fz, Cz, and Pz sites. While both mean latency and mean amplitude values differed among the three sites, with the greatest amplitude and shortest latency recorded from site Cz, differences were not statistically significant. Similarly, mean amplitude and latency value differences did not reach statistical significance for acoustically similar versus acoustically divergent digit pairs at any of the three sites. [ABSTRACT FROM AUTHOR] |
