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A Pilot Investigation on the Relationship Between Infant Vocal Characteristics at 12 Months and Speech Motor

Helen L Long1, Sydney Jensen1,2, Katherine C Hustad1,2

  • 1Waisman Center, University of Wisconsin-Madison.

Journal of Speech, Language, and Hearing Research : JSLHR
|May 5, 2025
PubMed

Insights

Infants at risk for cerebral palsy (CP) with later speech motor impairment showed fewer complex vocalizations in infancy. This finding aids in the early prediction of speech motor difficulties.

Area of Science:

  • Pediatric Neurology
  • Developmental Pediatrics
  • Speech-Language Pathology

Background:

  • Early identification of speech motor impairment in children at risk for cerebral palsy (CP) is crucial for timely intervention.
  • Infant vocalizations offer potential early biomarkers for neurodevelopmental conditions.
  • Understanding the relationship between early vocal patterns and later speech outcomes can refine predictive models.

Purpose of the Study:

  • To explore the association between infant vocal characteristics and the development of speech motor impairment in high-risk children.
  • To identify potential early indicators of speech motor difficulties in infants.
  • To inform future research on the early prediction of speech motor impairment in cerebral palsy.

Main Methods:

  • A pilot study involving 13 infants at risk for CP.
  • Assessment of infant vocal complexity, volubility, and consonant inventories around 12 months of age.
  • Correlation analysis with speech motor impairment measured by the Viking Speech Scale (VSS) at 4 years.

Main Results:

  • Infants who later exhibited greater speech motor impairment (at age 4) produced fewer developmentally complex vocalizations as infants.
  • No significant differences were observed in vocal stage attainment, volubility, or consonant diversity between groups.
  • These findings suggest vocal complexity may be a sensitive early marker.

Conclusions:

  • The study's results align with existing literature on infant vocal predictors of speech motor issues.
  • Early vocal complexity in high-risk infants may serve as a valuable indicator for potential speech motor impairment.
  • These findings support the development of data-driven hypotheses for early speech disorder prediction in infants.
Abstract

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