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Visualizing Visual Adaptation
Published on: April 24, 2017
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Adaptation-Induced Blindness Is Orientation-Tuned and Monocular
Deborah Apthorp1, Scott Griffiths2, David Alais3
1Research School of Psychology, College of Medicine, Biology & Environment, Australian National University, Australia.
I-Perception
|May 26, 2017
Summary
Adaptation-Induced Blindness (AIB) makes gradual visual stimuli invisible. This study found AIB is orientation-tuned and does not transfer between eyes, suggesting an early visual cortex origin.
Area of Science:
- Neuroscience
- Visual Perception
- Psychophysics
Background:
- Adaptation-Induced Blindness (AIB) is a recently discovered phenomenon.
- AIB causes highly visible stimuli with gradual onsets to become invisible after exposure to flickering gratings.
Purpose of the Study:
- Replicate the original AIB findings.
- Investigate the neural locus of AIB by testing orientation tuning and interocular transfer.
Main Methods:
- Replicated AIB using stimuli similar to the original experiment across various contrast levels.
- Tested orientation tuning and interocular transfer of AIB using full-contrast targets with abrupt or gradual onsets.
Main Results:
- The original AIB effect was replicated across all tested contrast levels.
- AIB was present only for gradual onset target stimuli.
- AIB demonstrated tight orientation tuning.
- No interocular transfer of AIB was observed.
Conclusions:
- The findings contradict the high-level 'gating of awareness' hypothesis for AIB.
- The orientation tuning and lack of interocular transfer suggest AIB originates in an early cortical processing stage.
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