/t/ before /ʈ/ or /ʈ/ before /t/: Emerging Trends from a Preliminary Study of Consonant Acquisition in Typically developing Sinhala-speaking Children aged 3 to 6 years
Purpose: Speech and language therapists use developmental norms established for consonant acquisition to determine whether a child has age-appropriate, delayed or disordered speech skills. There are currently no established norms for the acquisition of Sinhala consonants, which have implications for accurate diagnosis. The aim of this study was to document preliminary trends observed in the trajectory of consonant sound development in Sinhala-speaking young children so as to form a set of ‘working norms’.
Method: A picture-based articulation assessment was administered to 70 typically developing children who were between 3 years and 6 years 11 months of age.
Results: Regarding the rate of acquisition and order of acquisition, the findings displayed trends comparable to general patterns of consonant mastery reported within cross-linguistic studies. In addition, a different rate of acquisition and order of mastery was observed for both uncommon Sinhala language-specific speech sounds showing ambient language effects and for a few common sounds occurring in Sinhala and other languages.
Conclusion & Implications: The convergence and divergence in the rate and order of Sinhala consonant acquisition compared to the cross-linguistic literature has important clinical implications for assessment, early identification of speech difficulties and intervention within speech and language therapy practice in Sri Lanka.
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