Abstract
This investigation assessed the relative reliability of the human auditory evoked potential (AEP) amplitude-intensity and latency-intensity functions. Averaged AEP waveforms to 10 levels of stimulus magnitude were obtained from bipolar recordings. Variability and slope of group functions were constant, as indicated by nonsignificant differences in day-to-day residual variances and intersession regression coefficients. Periodic change in amplitude or latency thus indicated a shift of the entire function. Individual N1–P2 amplitude-intensity functions Were similarly reliable, while individual P2–N2 amplitude and latency measures tended to be more variable. No significant differences were obtained across sessions for regression coefficients based on either group or individual data. Intersession AEP amplitude and latency apparently varied systematically with stimulus intensity.
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