[Analysis of variance delimitation of factors influencing studies of acoustic evoked potentials].
The effect of the variables "stimulus intensity", "residual effect of previous stimulus intensity", "period effect" and "subject effect" on the amplitudes and on the peak latencies of the N1 and P1 components of the acoustical EEG evoked potentials was studied in human subjects with the use of an orthogonal experimental design. The stimulus intensity (30, 50 and 80 dB) accounts for the greatest part of the total variance of the amplitudes and of the peak latencies of N1.-The existence of a totalvariance component due to differences between the subjects is also statistically significant (P equals 5%), As far as the period effect (habituation effect) is concerned, only its effect on the amplitude of N1 - P2 is statistically significant. - The residual effect of the stimulus intensity used in the previous series was not significant.
D000328:Adult; D000704:Analysis of Variance; D001307:Auditory Perception / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D005071:Evoked Potentials; D006185:Habituation, Psychophysiologic; D006801:Humans; D011930:Reaction Time
Varianzanalytische abgrenzung von einflussfaktoren bei der untersuchung akustisch evozierter hirnpotentiale