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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

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

J Daniel McCarthy¹, Colin Kupitz¹, Gideon P Caplovitz¹

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

|February 25, 2014

Summary

A new Binding Ring Illusion shows that visual size perception is influenced by superimposed contours. Our findings reveal how explicit size cues assimilation affects perceived object size in visual processing.

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Area of Science:

Visual Perception
Psychophysics
Cognitive Neuroscience

Background:

Object size perception integrates retinal size, perceived distance, and relative size.
Classic illusions like Delboeuf and Ebbinghaus demonstrate size constancy and constructive perception.
Visual perception relies on integrating multiple cues for accurate size estimation.

Purpose of the Study:

Introduce and characterize a novel size illusion, the Binding Ring Illusion.
Investigate the stimulus conditions and perceptual principles underlying this new illusion.
Determine the level of visual processing at which this assimilation occurs.

Main Methods:

Presented a novel variant of the Delboeuf and Ebbinghaus illusions.
Systematically varied stimulus conditions to characterize the Binding Ring Illusion.
Analyzed perceptual judgments of size under different superimposed contour conditions.

Main Results:

Perceived size of a circular array is underestimated with a superimposed binding ring and overestimated if the ring slightly exceeds the array.
The perceived size of an array is susceptible to assimilation by an explicitly defined superimposed contour.
Assimilation occurs at a high level of visual processing, post-spatial frequency integration and global shape construction.

Conclusions:

The Binding Ring Illusion demonstrates that explicit size cues from superimposed objects can influence perceived array size.
Assimilation of superimposed contours affects size perception, indicating a high-level visual processing mechanism.
The size of an undefined array is malleable and influenced by the explicit size of a superimposed binding ring.