Early Perception of Intonation in Down Syndrome: Implications for Language Intervention

Area of Science:

• Developmental Psychology
• Linguistics
• Genetics

Background:

• Language difficulties are a key feature of Down syndrome (DS).
• Early language abilities in infants with DS are understudied, limiting targeted interventions.
• Understanding early strengths and weaknesses is crucial for supporting language development in DS.

Purpose of the Study:

• To investigate early intonation perception in infants with DS compared to typically developing (TD) peers.
• To identify potential differences in processing statement versus question intonation.
• To inform early language intervention strategies for infants with DS.

Main Methods:

• A visual habituation paradigm was employed.
• Infants with DS and TD infants were tested on their ability to discriminate statement and question intonation.
• Performance was analyzed across different age groups.

Main Results:

• Infants with DS successfully discriminated statement and question intonation, similar to TD infants.
• An age-related decline in intonation discrimination was observed in infants with DS, but not in TD infants.
• Older infants with DS showed a reduced ability to perceive intonation contrasts.

Conclusions:

• Prosody, including intonation, is important for early development in infants with DS.
• A critical developmental window for intonation sensitivity exists within the first six months of life for infants with DS.
• Early interventions focusing on intonation during the first semester could significantly support language acquisition in infants with DS.