Acoustic prominence: Understanding speech patterns in children with Down syndrome

Area of Science:

• Linguistics
• Speech-Language Pathology
• Developmental Psychology

Background:

• Acoustic prominence in speech emphasizes words, distinguishing new from given information.
• Research extensively covers acoustic prominence in typically developing (TD) children.
• Limited research exists on acoustic prominence marking in children with Down syndrome (DS).

Purpose of the Study:

• To compare acoustic prominence realization between children with Down syndrome (DS) and typically developing (TD) children.
• To investigate how DS children mark new versus given information using acoustic parameters.
• To analyze differences in fundamental frequency (f0), intensity, and duration.

Main Methods:

• A
• Puppet Show
• task involving 22 TD children and 9 children with DS.
• Analysis of acoustic parameters: mean f0, mean intensity, duration, and time-normalized f0.
• Statistical modeling using linear mixed-effects and generalized additive mixed models.

Main Results:

• Children with DS showed significantly higher mean fundamental frequency (f0) and lower intensity than TD children.
• No significant difference in speech duration was found between the groups.
• DS children displayed less controlled f0 contour patterns compared to the clear rising and falling contours in TD children.

Conclusions:

• Children with Down syndrome (DS) utilize different acoustic strategies for prominence marking compared to typically developing (TD) children.
• Distinct f0 contour patterns in DS speech may affect the clear signaling of new versus given information.
• Further research is needed to understand the full implications of these acoustic differences in DS communication.