Amplitude des potentielsévoqués moyens auditifs du vertex et intensitédes stimuli

Abstract

Summary Relations between amplitude of averaged evoked potentials recorded on the human vertex and intensity of acoustic stimuli are established through a statistical approach. The hypothesis of a linear relation of a similar relation to Steven's law established for loudness must be discarded. A somewhat different logarithmic relation appears more suitable. Thus acoustically evoked potentials of the human vertex do not strictly follow the same law as the specific cortical responses of animals nor as the stimulus intensity. But in practice differences are restricted to weak stimuli only. For most intensities, amplitude of averaged potentials of the vertex may be considered to be linearly related to loudness as long as data are collected through an experimental plan including repetitions and subjects, and cancelling other factors.