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Related Concept Videos

Perceptual Constancy01:12

Perceptual Constancy

Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
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Related Experiment Video

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End-To-End Deep Neural Network for Salient Object Detection in Complex Environments
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End-To-End Deep Neural Network for Salient Object Detection in Complex Environments

Published on: December 15, 2023

Low-level visual saliency does not predict change detection in natural scenes.

Jonathan A Stirk1, Geoffrey Underwood

  • 1School of Psychology, University of Nottingham, Nottingham, UK. jas@psychology.nottingham.ac.uk

Journal of Vision
|November 14, 2007
PubMed
Summary

Scene knowledge, not just visual salience, guides attention. Scene-inconsistent changes are detected faster, showing top-down effects override low-level visual factors in complex scenes.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Saliency models suggest attention is drawn to visually conspicuous areas.
  • However, scene knowledge may also influence eye movements, with scene-inconsistent objects often fixated earlier.

Purpose of the Study:

  • To investigate whether scene-inconsistent change detection is a top-down effect not confounded by low-level visual salience.
  • To determine if scene knowledge overrides visual salience in guiding attention.

Main Methods:

  • A change blindness paradigm was employed, altering objects for consistency with the scene and their measured visual salience (high/low).
  • Change detection speed and accuracy were recorded for scene-consistent and scene-inconsistent objects.

Main Results:

  • Change detection for high and low visual salience objects did not differ.
  • Changes in scene-inconsistent objects were detected faster and more accurately than scene-consistent objects, regardless of visual salience.

Conclusions:

  • The advantage in detecting scene-inconsistent changes is a genuine top-down effect.
  • This top-down effect can override low-level visual factors in complex naturalistic scenes.