Phonological Analysis of Child Speech Relational Analysis.
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Transcript of Phonological Analysis of Child Speech Relational Analysis.
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Phonological Analysis of Child Speech
Relational Analysis
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Model of Speech Disorders
A speech disorder can be phonetic (articulatory), phonemic (phonologic), or both
The broader term “speech disorder” encompasses all of these
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Nature of AssessmentPhonological analysis includes the identification, description, and classification of sound differences in a child’s speech that signal meaning differences
3 key concepts in phonological analysis (Grunwell, 1997): System Structure Stability
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System
Includes a set (or inventory) of different sounds produced by the childAdequate sound systems are symmetricalSounds are contrastive in place, voice, and
manner and function to signal differences in meaning
Sounds function contrastively in all word positions (I, M, F)
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Structure
Refers to the rules and organization of the sound system
Specifies the distribution and combination of sounds in a languageExample: [] cannot occur # ___
[pl, bl, kl, gl] are permissable clusters, but not *[tl, dl]
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Stability
Refers to the predictability of the speaker’s systemic and structural patterns (or organization) of their sound system
The inventory of sounds (SYSTEM) and the rules that govern the distribution and combination of sounds (STRUCTURE) provide the organization and therefore predictability of a “phonology”
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Relational Analysis
Child’s speech compared to adult speech in a one-to-one comparisonDifferences between the two productions can be described in terms of SODA, phonological processes, PVM error patternsOnly describes error sounds, therefore, often called an ERROR ANALYSIS
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Independent Analysis
Child’s speech is described as a unique, independent, self-contained sound systemNO comparisons made between child:adult systemsDescribes what the child DOES rather than what the child does NOT do (as in error/relational analysis)
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Issues in Completing a Phonological Analysis of Child Speech
Type and length of sample Sound inventory ~ pattern test Elicited single word ~ conversational 50 words ~ > 300 words
Phonetic transcription Must complete whole-word transcription
Severity of disorder Mild-moderate: relational analysis of sound
inventory or pattern test may be sufficient Severe-profound: independent + relational
analyses with larger samples (150-200 words)
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Two Frameworks for Phonological Analysis
Relational Analysis SODA Distinctive feature analysis Phonological process analysis PVM analysis
Independent + Relational Analyses PPK Systemic phonological analysis of child
speech (SPACS)
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Phonological Process Analysis
Number of commercial tests availableDunn (1982): APP identified most patterns
Non-standardized phonological process analysesDunn (1982): non-standardized analysis
was better than APP
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List of Common Phonological Processes
Common to many commercial tests, but not tied to any one published test
Listed according to syllable structure (deletion) processes and sound simplification (substitution and assimilation) processes
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Considerations in completing non-standardized phonological process
analysisChoose the process that BEST describes error pattern Ex: [o] for [so] could be either BACKING or
PALATALIZATION; PAL provides more precise description of what child is doing than broader label of BA
In general, each process only changes one aspect of PLACE, VOICE, or MANNER Process ordering (Edwards, 1992)
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Process OrderingSequential application of processes when one sound error involves more than one phonological process (PDI)“unraveling” of child’s error productions relative to adult target Example: /f/ adult target
s apicalization t stopping d prevocalic voicing [d] child’s pronunciation
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Steps in completing a non-standardized phonological process analysis
Complete whole-word transcription of speechTranscribe target word according to ATApply appropriate phonological processes in sequential manner until all aspects of sound change are accountedSummarize results (Summary Sheet)Select appropriate tx goals
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Summary Sheet
Organize/summarize results
Frequency of occurrence of each processProcess limitation/applicationDevelopmental information on processes
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Select tx targets
3 perspectives Intelligibility perspective
most frequently occurring process(es)Developmental perspective
Select earliest process(es) that should have been suppressed
Combination
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Advantages/Disadvantages of Phonological Process Analysis
AdvantageDescribes error patternsTerms are “user friendly”
DisadvantageTime needed to complete analysisSelection of tx targets from summary sheet
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Place-Voice-Manner Analysis
Describes error patterns in terms of 3 broad categories of consonant production (P-V-M)
Similar to phonological process analysis
Analysis is completed on PVM Analysis Form
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Steps in completing a PVM analysis
Complete whole-word transcriptionsUse black/red markers to color code Mark each consonant with appropriate color in appropriate box on PVM formList phonetic inventorySummarize error patterns according to PVMSelect tx targets
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Advantages/Disadvantages of PVM Analysis
Advantages Relatively simple and quick to complete Visual representation of error patterns
Selection of treatment targets is easier
Form useful to communicate with parents and others
Form useful to compare pre/post test results
Disadvantage does not identify assimilation errors