Abstract
Averaged auditory evoked potential (AEP) waveforms were computed during morning and evening sessions from human bipolar scalp recordings. Pure-tone stimuli were presented binaurally at 10 intensity levels at each time of day. Linear amplitude-intensity functions were obtained at both sessions. There was no relative change in the amplitude-intensity function. The difference between residual variances at the two time periods and the difference between regression coefficients were nonsignificant. However, waveform amplitude significantly decreased during the evening. The results demonstrated a negative shift of the AEP amplitude-intensity function from morning to evening.
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This investigation was conducted at St. Louis University and was supported, in part, by Research Grant 5 R01 OH 00395 from the National Institute of Occupational Safety and Health.
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Browman, C.P. Diurnal variation of the human auditory evoked potential. Psychobiology 7, 287–290 (1979). https://doi.org/10.3758/BF03326642
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DOI: https://doi.org/10.3758/BF03326642