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No Colavita effect: equal auditory and visual processing in people with one eye
Stefania S Moro1, Jennifer K E Steeves
1Centre for Vision Research and Department of Psychology, York University, 4700 Keele St., Toronto, ON, Canada.
Experimental Brain Research
|November 23, 2011
Summary
Individuals with one eye may experience cross-modal sensory compensation. People with monocular enucleation showed no visual dominance, suggesting auditory and visual processing are equally utilized.
Area of Science:
- Neuroscience
- Sensory Perception
- Ophthalmology
Background:
- Intra-modal compensation, like enhanced spatial vision, occurs in individuals with one eye.
- Unilateral eye loss may trigger cross-modal sensory compensation.
Purpose of the Study:
- To investigate cross-modal sensory compensation in individuals with monocular enucleation.
- To compare audiovisual target processing in monocularly enucleated individuals versus binocular controls.
Main Methods:
- Speeded detection and discrimination tasks involving audiovisual targets.
- Participants included individuals with monocular enucleation and binocularly viewing controls.
- Experiments measured responses to auditory, visual, and bimodal stimuli.
Main Results:
- All groups showed equal target detection abilities.
- Control groups exhibited the Colavita effect (visual dominance).
- The monocular enucleation group lacked the Colavita effect, showing equivalent auditory and visual processing.
Conclusions:
- Monocular enucleation may lead to a lack of visual dominance.
- Equivalent auditory and visual processing in the monocular group suggests sensory compensation.
- This compensation might involve the recruitment of deafferented visual cortical areas by other sensory inputs.
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