Phonological Patterns Study Notes

CHAPTER 9: Phonological Patterns Study Notes

Goals of This Chapter

  • Review and critique three theoretical approaches to analyzing phonological patterns in child speech sound development and disorders.

  • Describe independent and relational approaches to assessing error patterns in children's speech.

  • Describe evidence-based treatment approaches for error patterns in children's speech.

Case Study of Wally

  • Errors Identified:

    • Substitutes the following sounds in initial position:

    • p/f

    • t/θ

    • t/s

    • t/f

    • b/v

    • d/ð

    • d/z

    • d/ʤ .

    • Omits /f, s/ from clusters in all word positions.

  • Challenge for SLP: The numerous goals can overwhelm the speech-language pathologist (SLP).

Introduction to Phonological Patterns

  • Key Insights:

    • Errors should be viewed as patterns, not isolated incidents.

    • Three major perspectives on phonological patterns are:

    • Rules: Systematic statements about relationships among phonological elements.

    • Processes: Classifications of common patterns of errors within child speech.

    • Constraints: Language-specific restrictions that guide phonological development.

  • Goal: Identify broader patterns within children's speech and develop efficient assessment and intervention strategies.

Types of Phonological Patterns

Generative Phonology
Overview

  • Definition: Generative phonological rules describe relationships among phonological elements using underlying mental representations (target) versus surface representations (actual production).

  • Framework for Analysis:

    1. Identify the target sound.

    2. Define what was produced.

    3. Note the difference between the target and the produced sound.

    4. Identify contexts of changes.

    5. Generalize specific patterns.

Example of Rule Format

  • Rule representation:
    ext{target sound or class}
    ightarrow ext{change}/ ext{environment}

Assessment Tools Based on Generative Phonology

  • Critical Focus: Classes of sounds and changes to identify error manifestation based on natural classes of phonetic features like continuance.

  • Example Analysis: For Wally's substitution of fricatives as stops: [+continuant] -sonorant ightarrow [-continuant]/#_

    • This identifies the class of fricatives affected in a specific sound position (initial).

Clinical Implications of Generative Phonology

  • Encourages focus on:

    • Sound classes.

    • Sound changes.

    • Phonological environments.

  • Strategic Approach: Use of simple tables can help organize phonological analysis on sound class, change, and phonetic context.

Natural Phonology
Overview

  • Insight: Natural phonological processes represent universal phonetic bases and reflect physiologic limitations in speech production.

  • Key Assertion: Children learn to suppress processes not applicable within their specific language.

Clinical Implications

  • Provides standardized labels for phonological rules noted in young children and those with speech sound disorders (SSDs).

  • Types of Processes include:

    • Syllable Structure Processes: Affect the shape of words/syllables (e.g., syllable reduction, final consonant deletion).

    • Assimilation/Harmony Processes: Elements within a word become more similar (e.g., consonant harmony).

    • Substitution Processes: One element substitutes another (e.g., fronting).

Limitations of Natural Phonology

  • Oversimplifies or mishandles child phonological behavior by failing to enforce phonetic naturalness strictly.

Constraint Theory: Markedness and Faithfulness
Overview

  • Markedness Constraints: Restrict use of sound classes or structures (e.g., *CC disallowing certain clusters).

  • Faithfulness Constraints: Reflect maintained features in a child's speech output (e.g., preserving nasality).

Clinical Implications

  • Constraints provide a pathway to identifying issues confronted by children in phonological development; therapy should target weakening these constraints.

  • Principles for Intervention Goals:

    1. Prioritize high-frequency processes.

    2. Address processes impairing intelligibility.

    3. Implement strategies reflective of child's existing phonological knowledge, stimulability, and developmental order.

Assessment Strategies and Tools

  • Generative phonological rules prompt thorough phonological analysis, while processes serve ease and familiarity in treatment.

  • Recommended practices:

    • Use a combination of standardized and spontaneous speech testing.

    • Examine multiple phonological patterns together for enhanced insight into therapy requirements.

Relationship Between Processes, Constraints, and Goals

  • Connection: Processes lead to the identification of underlying constraints; effective intervention targets the constraints.

  • Example Goals:

    • Reduce stopping of fricatives due to markedness constraints.

    • Increase the production of non-alveolar consonants, thereby addressing the avoidance of specific sounds.

Conclusion

  • Phonological error patterns must be addressed in clusters or classes rather than individually to improve intervention efficacy.

  • The integration of generative phonology, natural processes, and constraints will facilitate clearer, more productive therapy goals for children with speech sound disorders (SSDs).