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McCarthy JD, Kupitz C, Caplovitz GP. The Binding Ring Illusion: assimilation affects the perceived size of a circular array. F1000Res. 2013;2:58doi: 10.12688/f1000research.2-58.v1.
McCarthy, J. D., Kupitz, C., & Caplovitz, G. P. (2013). The Binding Ring Illusion: assimilation affects the perceived size of a circular array. F1000Research, 258. https://doi.org/10.12688/f1000research.2-58.v1
McCarthy, J Daniel, et al. "The Binding Ring Illusion: assimilation affects the perceived size of a circular array." F1000Research vol. 2 (2013): 58. doi: https://doi.org/10.12688/f1000research.2-58.v1
McCarthy JD, Kupitz C, Caplovitz GP. The Binding Ring Illusion: assimilation affects the perceived size of a circular array. F1000Res. 2013 Feb 22;2:58. doi: 10.12688/f1000research.2-58.v1. eCollection 2013. PMID: 24555042; PMCID: PMC3901510.1.
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F1000Res. 2013 Feb 22;2:58. doi: 10.12688/f1000research.2-58.v1. eCollection 2013.

The Binding Ring Illusion: assimilation affects the perceived size of a circular array.

F1000Research

J Daniel McCarthy, Colin Kupitz, Gideon P Caplovitz

Affiliations

  1. Department of Psychology, University of Nevada Reno, Reno, NV, 89557, USA.

PMID: 24555042 PMCID: PMC3901510.1 DOI: 10.12688/f1000research.2-58.v1

Abstract

Our perception of an object's size arises from the integration of multiple sources of visual information including retinal size, perceived distance and its size relative to other objects in the visual field. This constructive process is revealed through a number of classic size illusions such as the Delboeuf Illusion, the Ebbinghaus Illusion and others illustrating size constancy. Here we present a novel variant of the Delbouef and Ebbinghaus size illusions that we have named the Binding Ring Illusion. The illusion is such that the perceived size of a circular array of elements is underestimated when superimposed by a circular contour - a binding ring - and overestimated when the binding ring slightly exceeds the overall size of the array. Here we characterize the stimulus conditions that lead to the illusion, and the perceptual principles that underlie it. Our findings indicate that the perceived size of an array is susceptible to the assimilation of an explicitly defined superimposed contour. Our results also indicate that the assimilation process takes place at a relatively high level in the visual processing stream, after different spatial frequencies have been integrated and global shape has been constructed. We hypothesize that the Binding Ring Illusion arises due to the fact that the size of an array of elements is not explicitly defined and therefore can be influenced (through a process of assimilation) by the presence of a superimposed object that does have an explicit size.

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