Phonological Development in Urdu-Speaking Children: A Systematic Review

Background: Speech and language researchers study phonological acquisition and evaluate the errors that children make to understand this complex process. This information provides clinicians with a scientific reference for better assessment and intervention services to children with articulation/phonological disorders. Urdu is a language spoken by more than 200 million speakers worldwide. However, research on Urdu phonological development is in its infancy. Purpose: This systematic review aimed to identify relevant studies and provide a comprehensive review of which aspects of Urdu phonological development have been targeted, along with the reported findings. Method: Five phases of the Preferred Reporting Items for Systematic Review and Meta-Analyses guidelines were followed. All retrieved studies published between January 1980 and March 2020 and focusing on Urdu speech sound acquisition and/or phonological processes in typically developing native Urdu speakers aged up to 8 years were included in the review. The final search was conducted on May 4, 2020. Results: A total of 873 records were identified from five databases and a manual search. Nine studies fulfilling the inclusion criteria were included in the final review. All studies were published in the English language, five of which were unpublished master's theses and four were peer-reviewed journal articles. Four of these studies focused on consonant acquisition, whereas five explored phonological processes. No study focused on the acquisition of Urdu vowels, diphthongs, or consonant clusters. These shortlisted studies were reviewed in detail to determine participants' demographic characteristics, focused areas of phonological acquisition, data elicitation methods and contexts, transcription systems, and major findings. Conclusion: This study provides a comprehensive review of the available literature on Urdu phonological development and highlights areas for future research.