Syllabic patterns in typical and atypical phonological development: ultrasonographic analysis

Area of Science:

• Speech-language pathology
• Phonetics
• Developmental linguistics

Background:

• Phonological development in children is crucial for effective communication.
• Atypical phonological development can lead to persistent speech sound errors.
• Ultrasonography offers a non-invasive method to study tongue articulation.

Purpose of the Study:

• To compare tongue articulation during syllable production in children with typical and atypical phonological development.
• To investigate differences in tongue area measurements between groups using ultrasonography.
• To analyze the production of consonant-vowel (CV) and consonant-consonant-vowel (CCV) syllable patterns.

Main Methods:

• Utilized ultrasonography to capture simultaneous audio and tongue images during speech tasks.
• Recruited ten Brazilian children: five with typical and five with atypical phonological development.
• Analyzed the area between the tongue tip and blade for nine word pairs across CV and CCV syllables.

Main Results:

• Significant differences were found in tongue area measurements between children with typical and atypical phonological development (p < 0.000).
• Children with atypical phonological development exhibited larger tongue area measurements for both CV and CCV syllables.
• No significant differences were observed in tongue area measurements related to the syllabic patterns themselves (p > 0.658).

Conclusions:

• Greater tongue area usage in atypical phonological development indicates potential difficulties in differentiating tongue tip and anterior body movements.
• These articulatory differences may underlie speech sound errors in children with phonological disorders.
• Ultrasonography is a valuable tool for understanding the biomechanics of speech production in developmental phonology.