Response patterns to vowel formant perturbations in children.

Area of Science:

• Speech-language pathology
• Developmental neuroscience
• Auditory perception

Background:

• Auditory feedback is crucial for speech motor control.
• Its specific role in speech development remains unclear.
• Understanding this role is key to addressing speech disorders.

Purpose of the Study:

• To investigate the role of auditory feedback in speech development.
• To examine how children aged 4-9 years adapt to altered auditory feedback.
• To identify age-related differences in speech compensation and adaptation.

Main Methods:

• Real-time auditory feedback perturbation was applied to children's vowel sounds.
• Acoustic analyses (formant magnitudes F1 and F2) of speech were performed.
• Compensatory and adaptive responses to altered auditory feedback were measured.

Main Results:

• Children compensated and adapted their speech to oppose auditory perturbations.
• Younger children showed greater F1 compensation, while older children showed greater F2 adjustment.
• Older children exhibited more direct and less variable responses than younger children.

Conclusions:

• Auditory feedback integration continues to develop between 4 and 9 years of age.
• Age-related differences in speech adaptation and compensation were observed.
• These findings highlight the evolving role of auditory feedback in speech motor control development.