Fundamentally different representations of color and motion revealed by individual differences in perceptual scaling.

ABSTRACT: The coordinate frames for color and motion are often defined by three dimensions (e.g., responses from the three types of human cone photoreceptors for color and the three dimensions of space for motion). Does this common dimensionality lead to similar perceptual representations? Here we show that the organizational principles for the representation of hue and motion direction are instead profoundly different. We compared observers' judgments of hue and motion direction using functionally equivalent stimulus metrics, behavioral tasks, and computational analyses, and used the pattern of individual differences to decode the underlying representational structure for these features. Hue judgments were assessed using a standard "hue-scaling" task (i.e., judging the proportion of red/green and b

SUBMITTER: Emery KJ 

PROVIDER: S-EPMC9942855 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature