FIG. 1.

A Schematic stimulus configurations used in the behavioral experiments: reference and deviant. The reference configuration consists of two diotic click pairs (ITD = 0), delayed by an inter-click interval (ICI). In the deviant configuration, the lead is represented as a diotic click pair (lead-ITD = 0) and the lag as a dichotic click pair (lag-ITD > 0). B Interleaved stimulus presentation used in the CEOAE experiment. Three configurations (SC single click; DC double click; DCI double-click inverted) were repeated 1,800 times within a sequence for each ICI condition and for an ITD of 300 μs. C Stimulus presentation for the ABR experiment. A deviant configuration was repeated 2,000 times, for each ICI condition and for an ITD of 300 μs. The ABRs were recorded by using four electrodes: Fz (ground, positioned at the forehead), Cz (reference, positioned at the vertex), and M1 and M2 (left and right mastoids).