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Prism adaptation in virtual and natural contexts: Evidence for a flexible adaptive process
Louis-Nicolas Veilleux1, Luc Proteau
1a Département de kinésiologie , Université de Montréal , Montréal , QC , Canada.
Quarterly Journal of Experimental Psychology (2006)
|October 23, 2014
Summary
Prism adaptation after-effects are significantly larger in natural settings compared to virtual ones. This suggests a single adaptive process, with adaptation depth depending on sensory information convergence.
Area of Science:
- Neuroscience
- Human-Computer Interaction
- Motor Control
Background:
- Prism adaptation studies show varying after-effects between virtual and natural conditions.
- Conflicting theories exist regarding whether distinct or unified adaptive processes are involved.
Purpose of the Study:
- To reconcile conflicting interpretations of prism adaptation differences in virtual versus natural contexts.
- To investigate the role of visual feedback type and timing in prism adaptation.
Main Methods:
- Forty participants were divided into natural (video feedback) and virtual (computer-generated feedback) groups.
- Participants experienced laterally displacing prism perturbation with concurrent or terminal visual feedback.
- After-effects were measured for adaptation to prism-induced visuomotor transformations.
Main Results:
- After-effects were twice as large in the natural context compared to the virtual context.
- No significant differences were found between concurrent and terminal feedback conditions.
- Adaptation generalized to untested targets and workspace, indicating robust learning.
Conclusions:
- Prism adaptation in virtual and natural contexts likely involves the same underlying process.
- The reduced after-effects in the virtual context are attributed to a lesser degree of convergence between proprioceptive and visual information.
- Adaptation depth is modulated by the congruence of sensory inputs related to hand representation.
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