Learning trajectories for speech motor performance in children with specific language impairment

Area of Science:

• Speech-language pathology
• Developmental psychology
• Motor learning

Background:

• Specific language impairment (SLI) is often associated with motor skill deficits.
• Procedural learning tasks can be challenging for children with SLI.
• The potential for motor learning deficits in SLI requires further investigation.

Purpose of the Study:

• To investigate motor learning capabilities in children with SLI.
• To compare speech motor performance and learning rates between children with SLI and typically developing (TD) children.
• To determine if motor deficits accompanying SLI impact speech motor learning.

Main Methods:

• Twelve children with SLI and thirteen TD children participated.
• Participants imitated complex nonwords across three production blocks (immediate and delayed).
• Lip movements were recorded using Optotrak and analyzed for production duration and stability.

Main Results:

• Both groups showed decreased production duration in later blocks, with comparable rates of change.
• A trend towards increased production stability was observed in both groups.
• Children with SLI exhibited similar learning rates for speech motor efficiency as TD children.

Conclusions:

• While motor deficits are common in SLI, this study indicates speech motor learning is not impaired.
• Children with SLI can adapt and improve speech motor efficiency at a rate similar to their TD peers.
• Findings suggest a modifiable aspect of the motor deficit associated with SLI.