FIGURE 4.

Cortical responses during attention. We recorded the EEG responses of eight subjects, averaged over the beat-responsive channels, as they either attended to a musical piece (black) or ignored it (red). The difference in response between ignoring and attending was negative in almost all of the trials, and statistically significant in about half of the trials (*p < 0.05; **p < 0.01; ***p < 0.001). Error bars denote the SEM. At the level of individual subjects, the average difference between the responses in both conditions was always negative and almost always significant (blue). The population average of the response difference was significantly negative as well (green).