Fig 2. Task and stimuli of Exp 1.

(A) Time course of standard and comparison stimulus presentations. A multisensory standard stimulus was passively viewed before every five comparison stimulus trials (one shown in full, the remaining indicated by the additional arrows). For each trial, the modality of the comparison stimulus was pseudorandomly selected to be auditory, visual, or audiovisual. Participants indicated whether the comparison stimulus was faster or slower than the standard. (B) Portion of an example synchronous sequence. Visual stimulus (red) follows a square wave modulation pattern and the auditory stimulus (green) is a cosine-ramped bandpass signal. (C) Sequence-generating algorithm. Frames are divided into triplets, and events are assigned within the triplet randomly unless the previous triplet contains event, in which case events are in the identical position as in the previous triplet.