The Consistency of Crossmodal Synchrony Perception across the Visual, Auditory, and Tactile Senses
Research output: Contribution to journal › Article › peer-review
Colleges, School and Institutes
Crossmodal judgments of relative timing commonly yield a non-zero point of subjective simultaneity (PSS). Here, we test whether subjective simultaneity is coherent across all pair-wise combinations of the visual, auditory, and tactile modalities. To this end, we examine PSS estimates for transitivity: if stimulus A has to be presented x ms before stimulus B to result in subjective simultaneity, and B y ms before C, then A and C should appear simultaneous when A precedes C by z ms, where z=x+y. We obtained PSS estimates via two different timing judgment tasks — temporal order judgments (TOJ) and synchrony judgments (SJ) — thus allowing us to examine the relationship between TOJ and SJ. We find that (i) SJ estimates do not violate transitivity, and that (ii) TOJ and SJ data are linearly related. Together, these findings suggest that both TOJ and SJ access the same perceptual representation of simultaneity and that this representation is globally coherent across the tested modalities. Furthermore, we find that (iii) TOJ estimates are intransitive. This is consistent with the proposal that while the perceptual representation of simultaneity is coherent, relative timing judgments that access this representation can at times be incoherent with each other due to post-perceptual response biases.
|Journal||Journal of Experimental Psychology: Human Perception and Performance|
|Early online date||25 Jan 2016|
|Publication status||E-pub ahead of print - 25 Jan 2016|