Fig. 1.

Schematic of successive events within a trial for Experiments 1 and 2. Participants maintained fixation on a central square, as confirmed by eye-tracking for the analyzed trials. A tilted Gabor patch was then presented unpredictably to the left (as shown) or right (equiprobable) visual hemifield, concurrently with a sound on the same or opposite side. Participants reported the perceived orientation of the Gabor patch (tilted clockwise or anti-clockwise from vertical) by button press, then a new trial started. The inset at bottom-left depicts how the intensity profile was manipulated to produce the different sound types. Note that the “static” sound had a constant intensity value that was the mean of the other sound types, while the “looming” and “receding” had the same intensity profile as each other but reversed (i.e., rising or falling, respectively)