Figure 1. Roving paradigm used in the current study, with the calculation methods of the amplitude and latency of initial adaptation, subsequent adaptation, and MMN.
Figure 2. The adaptation curves based on the P1 (a and b), N1 (c and d), and P2 (e and f) peak amplitudes (left) and latencies (right) in each position of the first ten tones (error bars indicate standard deviations). *p < .006 based on paired-sample t-tests of each consecutive tone pair.
Figure 3. (a) Waveform and (b) Topography of MMN (N = 37). (a) The average MMN waveform (black) calculated by subtracting the amplitudes in the final position of each train of stimuli (4th position or after) from that in the deviants. Data were pooled from 25 fronto-central electrodes (black dots at the top-left corner). Waveforms of deviants and the final tones are shown in red and blue respectively. The highlighted part indicates the MMN time window (76–196 ms). (b) From left to right, the topographic maps of deviants, final tones in 4th to 30thpositions, and the corresponding MMN.
Figure 4. Scatter plots of significant correlations or regressions between MMN and the adaptation variables, including (a) N1 initial adaptation amplitude, (b) P1 initial adaptation amplitude, (c) P2 subsequent adaptation amplitude, and (d) P2 subsequent adaptation latency. Each dot indicates a datum from each participant (N = 29).
Figure 5. Scalp topographies based on the average individual peak amplitude (N = 37). (a) From left to right, the topographic maps of deviants, 2nd tones, and the ensuing initial adaptation in the N1. (b) From left to right, the topographic maps of 2nd tones, final tones (4th to 30th positions), and the ensuing subsequent adaptation in the P2.
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Figure 1