Figure 1.

(a) Prolonged exposure to asynchronous auditory-visual stimuli alters the point of subjective simultaneity (PSS)—the physical stimulus-onset asynchrony required for stimuli to be perceived as simultaneous. Relative to baseline conditions with no adaptation (black star), the PSS shifts in the direction of the adapting asynchrony (red and blue stars). If this effect is representative of a uniform recalibration of perceived timing, the perception of all temporal relationships ought to be equally affected (diagonal lines). (b) Schematic of the experimental sequence, designed to measure adaptation-induced changes in perceived timing over a range of stimulus-onset asynchronies (SOAs). See main text for details.