Figure 1.

Experimental protocol. The experimental paradigm included four blocks, two of which are shown here. Sounds had duration of 100 or 150 ms (short and long rectangles, respectively) and were presented in groups of five. The five stimuli could be either identical or of different duration and play the role of standard or deviant stimuli at global or at local level. In the other two blocks of the experiment the 100 ms and 150 ms duration sounds are swapped with respect to what is shown here. This experimental design was similar to the one in Fig. 1 of Bekinschtein et al. (2009).