Adaptation to Glass Patterns

The adapting stimuli to the left and right of fixation are 100% coherent radial and concentric patterns, respectively. This format was chosen for demonstration purposes to facilitate comparison of the effects of adaptation to the two opposite patterns. Over the course of several cycles, the salience of the adapting patterns decreases while the illusion of structure in the test stimuli becomes stronger. The perceived structure in the test patterns is opposite to that in the adaptor at the same position, such that the radial adaptor generates a concentric aftereffect and vice versa.

On each cycle of the movie (middle), a brief presentation of the same test pattern of randomly oriented dot dipoles is presented on either side of the central fixation point (top), followed by several seconds of the adapting stimuli.
The adapting stimuli to the left and right of fixation are 100% coherent radial and concentric patterns, respectively. This format was chosen for demonstration purposes to facilitate comparison of the effects of adaptation to the two opposite patterns. Over the course of several cycles, the salience of the adapting patterns decreases while the illusion of structure in the test stimuli becomes stronger. The perceived structure in the test patterns is opposite to that in the adaptor at the same position, such that the radial adaptor generates a concentric aftereffect and vice versa.
Illustration of the appearance of the test stimuli after adaptation, based on measurements of the aftereffect in terms of stimulus coherence.