Speech disfluencies in children with Down Syndrome

Area of Science:

• Speech-language pathology
• Developmental pediatrics
• Genetics

Background:

• Speech and language development in individuals with Down syndrome (DS) is frequently delayed or disordered.
• Speech disfluencies, such as stuttering and cluttering, are more common in children with DS.
• Previous research often used mixed age groups and varied methodologies, hindering direct comparisons.

Purpose of the Study:

• To analyze and describe the speech disfluencies in a specific group of children with Down syndrome.
• To focus exclusively on children aged 3 to 13 years for a more homogenous analysis.
• To differentiate between stuttering and cluttering in the speech of children with DS.

Main Methods:

• Studied 26 Dutch-speaking children with Down syndrome (DS) aged 3-13 years.
• Collected spontaneous speech samples and analyzed 50 utterances per child.
• Classified disfluencies as stuttering-like (SLD) or other (OD), using established criteria for stuttering and cluttering.

Main Results:

• 30% of children with DS in the study exhibited stuttering, a prevalence considerably higher than in typically developing children.
• The distribution of speech disfluency types in children with DS differed from that of typically developing children.
• While some cluttering-like features were observed, no participants were definitively diagnosed with cluttering or cluttering-stuttering.

Conclusions:

• The high prevalence of stuttering in children with DS warrants further investigation.
• Speech disfluency patterns in children with DS are distinct and require tailored understanding.
• Cluttering may present differently or be less prevalent than previously assumed in this population.