Weak overcomes strong in sensory integration: shading warps the disparity field

Celine Aubuchon*, Jovan Kemp, Dhanraj Vishwanath, Fulvio Domini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Human perception is often based on the integration of multiple sensory cues, where more statistically reliable cues are considered to have stronger influence on the percept. For example, in three-dimensional shape perception, binocular disparity is considered the most reliable cue at close distances, while pictorial cues like shading are considered less reliable. In three within-subject experiments, we instead show that shading can override disparity, a result that cannot be explained by its measured reliability, cue vetoing or cue promotion. Observers judged the shape of a disparity surface that was combined with different shading patterns. In all tests, shading altered the perceived shape specified by a strong disparity signal in a way that could not be predicted by standard accounts of three-dimensional perception. We find an example of unaccounted for cue cooperation, where shading becomes strong when it interacts with disparity.
Original languageEnglish
Number of pages11
JournalProceedings of the Royal Society B: Biological Sciences
Volume291
Issue number2033
DOIs
Publication statusPublished - 16 Oct 2024

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