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Nonhomogeneous transfer reveals specificity in speech motor learning
Amélie Rochet-Capellan1, Lara Richer, David J Ostry
1McGill University, Montreal, Canada.
Motor learning, studied using speech production, shows limited generalization to new situations. Learning appears specific to training instances, similar to limb movements, with generalization depending on acoustic similarity.
Area of Science:
- Motor control
- Speech production
- Auditory feedback
Background:
- Motor learning's ability to generalize is debated.
- Speech production offers a model to study motor learning generalization.
Purpose of the Study:
- Investigate generalization in motor learning using speech production.
- Determine if motor learning is specific to training situations or generalizes to new ones.
Main Methods:
- Subjects trained on consonant-vowel-consonant utterances with altered auditory feedback.
- Acoustical similarity between training and transfer utterances was varied.
- Generalization tested by having subjects produce a transfer utterance with unaltered feedback.
Main Results:
- Subjects adapted speech output to compensate for auditory perturbation.
- Limited transfer of motor learning observed.
- Generalization depended on acoustical similarity between training and transfer utterances.
Conclusions:
- Speech motor learning shows limited generalization.
- Findings suggest speech learning is specific to individual instances.
- Generalization patterns are comparable to those seen in limb motor learning.
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