Figure 1

Schematic representation of the web-based Simultaneity Judgment task. In each trial a fixation point is presented at the center of the screen for a variable time between 1450 and 1800 ms before the appearance of the first stimulus. A fixed array of SOAs between the first and second stimulus was used across trials (± 350, ± 300, ± 250, ± 200, ± 150, ± 100, ± 50, 0 ms). Trials were counterbalanced between the following two conditions: (A) Auditory Leading (AL) trials: when the auditory stimulus was followed by the visual stimulus, (B) Visual Leading (VL trials): when the visual stimulus was followed by the auditory stimulus. The stimuli were presented alternatively on the left or right side of the screen and auditory stimuli on either the left or right headphones/earphones channel, leading to a spatially congruent or incongruent stimulus presentation.