Figure 1.
A) Tone-alternation sequence. B) Reverse block. Letters C (center) and L (left) indicate the perceived location of the sound for standards (in black), and deviants (in grey).
Table 1.
Pattern regularity: mean amplitudes of the P0, Na, Pa and Nb components of the MLR and the MMN range.
Figure 2.
AEPs for the pattern regularity.
Grand average evoked potentials (N = 24) elicited by standard tones (grey lines), and deviant tones (black lines) at the Fz electrode. The upper and lower rows show the responses to the 800 and 650 Hz tones, respectively. A) Waveforms in the MLR range. B) Waveforms in the MMN range. Dashed lines show the MMN elicited by the repetition deviants. The grey bars denote the windows of measurement. [*p<0.001].
Table 2.
Simple regularity (ITD change): mean amplitudes of the P0, Na, Pa and Nb components of the MLR and the MMN range.
Figure 3.
AEPs for the simple regularity (ITD change).
Grand average evoked potentials (N = 24) elicited by standard tones (grey lines), and deviant tones (black lines) at the Fz electrode. Note that standard tones for the simple regularity correspond to the standard tones in the reverse block, which had the same physical characteristics as the ITD deviants in the tone-alternation sequence. The upper and lower rows show the responses to the 800 and 650 Hz tones, respectively. A) Waveforms in the MLR range. B) Waveforms in the MMN range. Dashed lines show the MMN elicited by the ITD deviants. The grey bars denote the windows of measurement in A) and B). [*p<0.05; **p<0.001].
Figure 4.
Scalp topographies for the simple regularity (ITD change).
A) Long-latency responses (90–130 ms time window) to the standard tones of the reverse block, the deviant tones and the MMN. B) MLR responses at Na (21–25 ms time window) to the standard tones of the reverse block, the deviant tones and their difference (deviant-standard).