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Phonological process development with MLU-referenced guidelines

R J Prater, R W Swift

    Journal of Communication Disorders
    |September 1, 1982
    PubMed
    Summary
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    This study found that Mean Length of Utterance (MLU) is the best predictor for understanding how children develop phonological processes. These findings offer guidelines for tracking speech sound development in young children.

    Area of Science:

    • Linguistics
    • Developmental Psychology
    • Speech-Language Pathology

    Background:

    • Phonological processes are common in early speech development.
    • Understanding the developmental trajectory of these processes is crucial for identifying potential speech sound disorders.
    • Stampe's hypothesis provides a theoretical framework for analyzing phonological development.

    Purpose of the Study:

    • To test Stampe's hypothesis regarding phonological process development.
    • To determine the most effective classification method (MLU or CA) for analyzing phonological processes in young children.
    • To establish MLU-referenced guidelines for the emergence, duration, elimination, and universality of phonological processes.

    Main Methods:

    • Sixty children aged 21-48 months were grouped by Mean Length of Utterance (MLU) and Chronological Age (CA).

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  • The Phonological Process Analysis (Weiner, 1979) was administered to assess sixteen phonological processes.
  • Statistical analyses included multiple regression correlation, three-way ANOVA, and Tukey's HSD tests.

    • Main Results:

    • Mean Length of Utterance (MLU) proved to be the superior classification variable for describing phonological processes.
    • Significant differences in the use of phonological processes were observed across different MLU and age groups.
    • The study identified patterns in the emergence, duration, and elimination of sixteen phonological processes.

    Conclusions:

    • MLU is a more effective metric than chronological age for characterizing phonological process development in children.
    • The findings support the development of evidence-based, MLU-referenced guidelines for speech-language pathologists and researchers.
    • These guidelines can aid in the assessment and intervention of phonological disorders.