Figure 1.

Experimental design overview. (a) Detection task: Depending on condition, participants were required to detect a white flash that always occurred within a black circle in the center of the screen (“VI”, top row), a “click” sound (“AU”, second row), or both the flash and click when presented simultaneously (“VIAU”, third row), by pressing the “enter” key on the keyboard. In all detection task conditions, four to five stimuli were presented per trial that lasted 50 ms and occurred at random time points within a trial. (b) Multiple object tracking task: The trial logic is shown for performing the multiple object tracking task alone (top row), and in combination with the visual (MOT+VI, second row); the auditory (MOT+AU, third row); or the audiovisual (MOT+VIAU, fourth row) detection task.