Prosodic Imitation in Children With Down Syndrome: Evidence From Sentence Repetition and Pitch Contour Modeling

Area of Science:

• Linguistics
• Speech-Language Pathology
• Developmental Psychology

Background:

• Prosodic speech production is crucial for conveying meaning and emotion.
• Children with Down syndrome (DS) may exhibit atypical prosodic patterns.
• Understanding these patterns is vital for effective communication interventions.

Purpose of the Study:

• To investigate expressive prosodic patterns in children with Down syndrome (DS).
• To assess the utility of dynamic fundamental frequency (F0) modeling in analyzing prosody.
• To compare prosodic speech production in children with DS and typically developing (TD) children.

Main Methods:

• A structured imitation task involving sentence repetition was used.
• Four prosodic conditions were elicited: neutral, yes/no questions, subject emphasis, and object emphasis.
• Acoustic analysis of fundamental frequency (F0) contours was performed using generalized additive mixed models.

Main Results:

• Both groups produced F0 variations for prosodic contrasts.
• Typically developing (TD) children showed clearer and more distinct F0 contours.
• Children with DS exhibited less differentiated contours, though question intonation was marked.

Conclusions:

• Children with DS can produce prosodic contrasts via imitation, but with reduced contrastiveness.
• Future research should investigate other prosodic features (intensity, duration) in DS.
• Structured imitation may inform future assessment and intervention for expressive prosody in DS.