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Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
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Is object-based warping solely object-based?

Nicholas Baker1, Alexa Vushaj1, William Friebel1

  • 1Department of Psychology, Loyola University Chicago.

Journal of Experimental Psychology. Human Perception and Performance
|April 4, 2024
PubMed
Summary
This summary is machine-generated.

The object-based warping illusion, where dots seem farther apart on objects, is not solely driven by perceived objecthood. Low-level visual features like contour solidity significantly influence the illusion’s strength.

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Area of Science:

  • Visual perception
  • Cognitive psychology
  • Experimental psychology

Background:

  • Object-based warping is a visual illusion where superimposed dots appear farther apart on objects.
  • Previous research linked the illusion's strength to the perceived objecthood of a display.

Purpose of the Study:

  • To investigate if perceived objecthood alone determines the warping illusion's strength.
  • To determine if low-level visual factors, separate from objecthood, also influence the illusion.

Main Methods:

  • Experiments varied low-level features (e.g., continuous vs. disconnected elements) to assess their impact on the warping illusion.
  • Objecthood was manipulated while keeping low-level features constant.
  • Displays with specific low-level features were tested for their warping effect even with weak object configuration.

Main Results:

  • The warping illusion's strength varied with how shape was defined (continuous edges > disconnected elements), not just shape variety.
  • Displays with matched low-level features showed consistent warping effects regardless of perceived unity.
  • Low-level features like contour solidity and convexity significantly predicted warping effect sizes, independent of perceived objecthood.

Conclusions:

  • The spatial warping illusion is not solely object-based.
  • Factors such as contour solidity and the position of contours relative to reference dots play crucial, independent roles in determining the illusion's strength.