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Iperception. 2018 Jan 22;9(1):2041669517748338. doi: 10.1177/2041669517748338. eCollection 2018.

Can Rotational Grouping Be Determined by the Initial Conditions?.

i-Perception

Allan C Dobbins, Jon K Grossmann

Affiliations

  1. Department of Biomedical Engineering, Vision Science Research Center, University of Alabama at Birmingham, AL, USA.

PMID: 29383235 PMCID: PMC5784469 DOI: 10.1177/2041669517748338

Abstract

Objects rotating in depth with an ambiguous rotation direction frequently appear to rotate together. Corotation is especially strong when the objects are interpretable as having a shared axis. We manipulated the initial conditions of the experiment by having pairs of objects initially appear to be unambiguous, and then make either a sudden or gradual transition to ambiguous spin. We find that in neither case do coaxial counter-rotating objects persist in being perceived as counter-rotating. This implies that the perceptual constraint that favors coaxial corotation overrides the initial perceptual state of the objects.

Keywords: bistable perception; initial conditions; kinetic depth effect; perceptual grouping; structure from motion; transparency

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