Figure 1

Grand-averaged waveforms of change-N1 across seven subjects and the peak amplitude and latency of change-N1. A, effects of the interval between the standard and deviant sounds. Four intervals, 1, 10, 100, and 1000 ms, were tested. B, effects of the duration of the standard sound. Four durations, 25, 100, 500 and 1000 ms, were tested. C, effects of the magnitude of deviation on change-N1. Sound pressure (70 dB vs. 72, 73, 74, 75 and 76 dB), sound frequency (800 Hz vs. 808, 816, 824, 840 and 880 Hz), and sound location (interaural time delay, ITD, of 0.1, 0.2, 0.3, 0.4 and 0.5 ms) deviations were tested. The mean amplitude and latency across subjects of each experiment are plotted against the degree of the deviation of each variable. Error bars indicate ± SE. The correlation coefficient, r², in this figure shows values calculated with a logarithmic function using the mean data. Corresponding values for individual data appear in the text.