Collaborating to Obtain Phonological Acquisition Data for Local Schools

Area of Science:

• Linguistics
• Speech-Language Pathology
• Developmental Psychology

Background:

• Phonological acquisition is a critical area of study in speech-language pathology.
• Understanding typical phonological development informs clinical decision-making for speech sound disorders.
• Collaborative research between educational institutions and school practitioners can enhance evidence-based practices.

Purpose of the Study:

• To investigate phonological acquisition in typically developing children within a school system.
• To provide school-based speech-language practitioners with research experience.
• To identify critical indicators for speech sound disorder assessment.

Main Methods:

• A collaborative project involving 12 school-based speech-language practitioners and a university clinical phonologist.
• Transcription and analysis of speech samples from 520 typically developing children aged 2 years 6 months to 8 years 0 months.
• Coding of responses for syllable/word structures and phoneme classes, including omissions, substitutions, and distortions.

Main Results:

• Phoneme class acquisition varied by age, with liquids (/l/, /r/) acquired later (4-6 years).
• While strident phonemes were acquired by age 3, sibilant lisps persisted until age 7.
• Speech sound omissions were rare, unlike substitutions and distortions.

Conclusions:

• Consistent speech sound omissions are critical indicators for preschooler speech therapy eligibility.
• Omissions should be prioritized over substitutions and distortions when determining caseload eligibility.
• The collaborative model between university and school practitioners proved valuable for research and professional development.