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Related Experiment Video

Updated: May 13, 2026

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

Contour adaptation.

Stuart Anstis¹

¹Department of Psychology, University of California-San Diego, La Jolla, CA, USA. sanstis@ucsd.edu

Journal of Vision

|March 1, 2013

Summary

This summary is machine-generated.

Adapting to flickering outlines, termed contour adaptation, can make objects invisible, similar to contrast adaptation. This effect is selective, non-transferable between eyes, and primarily impacts luminance perception.

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Area of Science:

Visual perception
Neuroscience
Psychophysics

Background:

Contrast adaptation makes objects invisible after exposure to flickering stimuli.
Previous research focused on adapting to full stimuli, not just their outlines.

Purpose of the Study:

To investigate if adapting to flickering outlines (contour adaptation) has the same effect as contrast adaptation.
To explore the properties and applications of contour adaptation.

Main Methods:

Participants adapted to flickering circular outlines or specific grating orientations.
Tested for interocular transfer and color specificity of the adaptation.
Applied contour adaptation to simulated Cornsweet edges and Kanizsa subjective squares.

Main Results:

Adapting to flickering outlines rendered congruent test objects invisible, mimicking contrast adaptation.
Contour adaptation showed no interocular transfer and was specific to luminance, not color.
Selective adaptation to specific contours within complex displays (e.g., plaids, subjective squares) was demonstrated.

Conclusions:

Contour adaptation is a novel phenomenon demonstrating that visual edges are crucial for brightness perception.
This technique allows for selective removal of edges, offering new ways to study their role in vision.
Brightness information is concentrated at edges and propagates to fill surfaces.