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Phonological Analysis of Child Speech

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1 Phonological Analysis of Child Speech
Relational Analysis

2 Variables to Consider in Assessing Child Speech Disorders
Purpose of testing Age of child Severity of speech disorder Type of test (sound inventory, pattern test, conversational sample) Length of sample Recording of child’s responses (What’s your PQ? Do you need to review the phonetics websites?) PQ – phonetic quotent

3 Purpose of Testing

4 Different Purposes of Speech Testing
Screening Standardized Fluharty, Joliet 3-Minute Speech & Language Screen, Quick Screen of Phonology, Templin-Darley Screening Test Non-standardized Short answer and recitation Deep Testing C-PAC, CTA, McDonald Deep Test, Word Probes Criterion or Norm-Referenced Testing GFTA-2, BBTOP, PAT-3, Khan-Lewis, NPA, HAPP-3 Fluharty is most commonly used here.

5 Age of Child

6 Speech Assessment Battery for Infants/Toddlers
Case hx Parent questionnaires Hearing screening Oral-mechanism examination Samples (free play with caregiver and elicited sample) Sound play (infants) Songs (Old McDonald, Pop Goes the Weasel, Eensy, Wensy Spider, If You’re Happy and You Know It, etc.) Receptive/expressive language (e.g., PLS-4; SICD-R) Play – what level? early or symbolic?

7 Speech Assessment Battery for Preschool to School-Age
Case hx Medical, educational, psychological reports Hearing screening Oral-mechanism examination Single-word sound inventory test Stimulability Conversational language sample (phonological skills + morphosyntactic skills) Phonological awareness testing (PAT, CTOPP) Language testing (PPVT-III, TOLD-P:3, etc.)

8 Severity of Speech Disorder

9 Severity Considerations
Type of sample Conversation ~ elicited single words Conversation – recommended for all levels of severity, but will be more difficult to interpret for children with severe speech disorders Elicited single words: recommended for all levels, especially moderate to severe Sound inventory test ~ pattern test ~ systemic assessment The more severe, want to look for patterns; preferrably systemic assessment Length of sample Short (~ 50 words) or long (~ 200 words) Recommend longer samples for more severe disorders Severity and intelligibility ratings Recommended for all children Conversational sample is to see how intelligible they are/

10 Severity Ratings: Quantitative or Perceptual ratings
Quantitative ratings PCC or PDS Also, PDI, PPK ACI or RDI (for distortions) Perceptual ratings Bleile’s 4-Point Clinical Judgment Scale of Severity No disorder – Mild disorder – Moderate disorder – Severe disorder Generally an average score of 3.5 is required to provide clinical services Panel of judges (familiar ~ unfamiliar) rate a segment of child’s recorded speech Blind panel of raters You can get a quantitative rating or perceptual rating for severity.

11 Intelligibility Ratings
Intelligibility often related to severity, but is a separate index Generally measured using rating scales (Bleile’s 3-point or 5-point intelligibility scales) Intelligible – Intelligible if topic is known – Unintelligible (3-point scale) Completely intelligible – Mostly intelligible – Somewhat intelligible – Mostly unintelligible – Completely unintelligible (5-point scale) Panel of listeners 19 different intelligibility measures (Kent, Miolo, & Bloedel, 1994)

12 Types (Categories) of Speech Tests

13 4 Categories of Standardized Tests of Child Speech
Sound inventory tests Pattern tests Computerized tests Tests of non-English phonology

14 Sound inventory tests Generally assess production of all English consonants in each permissable word position based on developmental norms (compare child’s score to normative sample to derive percentile rank) based on articulation framework, HOWEVER, can complete non-standardized phonological analyses (e.g., PVM or phonological process analysis if complete whole-word transcriptions)

15 Pattern Tests Rather than designed to assess all English sounds in each word position, created to sample particular patterns (e.g., FCD, CR, ST, FR, etc.) must do whole-word transcriptions ALL pattern tests based on construct of phonological processes Determine percent occurrence of particular patterns, compare to process norms (compute a Deviancy Score)

16 Computerized tests Most are based on construct of phonological processes (some are computerized versions of the pattern test, e.g., CAPP) enter whole-word transcriptions most give detailed information in addition to the pattern analysis (e.g., phonetic inventory, syllable structure, percent occurrence of each pattern/process)

17 Tests of non-English phonology
Only few non-English phonology tests -- all are Spanish AAP-S (Hodson’s Spanish version) CPAC-S (Contexual Probes of Articulation Competence-Spanish) others are sound inventory tests COMING SOON: International Speech Assessment (McLeod)

18 Dialectal Variations

19 Speech Difference ~ Speech Disorder?
Presence of a nonstandard dialect is a speech difference and does not necessarily imply a speech disorder Speaker’s dialect is D1, but can often shift (or code switch) from D1 to D2 However, a child speaking a nonstandard dialect can also have a speech disorder

20 Speech Difference ~ Speech Disorder?
A speech disorder exists if the following 3 conditions are present (Proctor, 1994): Child’s intelligibility is reduced to speakers within the child’s speech community Child misarticulates sounds that are similar in both SAE and D1 Child produces idiosyncratic patterns that are not characteristic of D1, or SAE, or of the code switching processes

21 Characteristics of AAE Dialect
AAE Phonological Rules Word Examples Transcription WF cluster reduction “test” ~ “tes” [tst] ~ [ts] Stopping of WI interdentals “they” ~ “dey” [e] ~ [de] Substitution of f/ and v/ intervocalically “nothing” ~ “nofing” “bathing” ~ “baving” [n] ~ [nf] [be] ~ [bev] Substitution of f/ WF “south” ~ “souf” [s] ~ [sf] Substitution of n/ WF “swing” ~ “swin” [sw] ~ [swn] Vowelization of [ɚ] “sister” ~ “siste” [sstɚ] ~ [st] Deletion of [l] in WF clusters “help” ~ “hep” [hlp] ~ [hp] Deletion of nasals WF with nasalization of preceeding vowel “moon” ~ “moo” [mun] ~ [m˜u] Devoicing of consonants WF “bed” ~ “bet” [bd] ~ [bt]

22 How do you select the appropriate test?
Decide if you want to do SODA or pattern assessment although can do pattern analysis on sound inventory if do W/W transcription artic vs phonology Severity -- few errors (sound inventory); multiple errors (pattern/computerized) Time and expertise -- limited time/expertise (computerized test)

23 What were similarities across different perspectives?
Clinical Forum on “Perspectives on the Assessment of Speech Disorders in Children” (AJSLP, 2002) What were similarities across different perspectives? Where did differences occur across the different perspectives? Which perspective matches what you’ve done in your clinical training? Which perspective makes most sense to you as a future SLP?

24 Standardized Tests: Lab 3
Assigned 2 tests to review Evaluated on understanding and administration of test Be familiar with test (and manual) BEFORE administration Some tests have strict procedures for administration. If you don’t stick to the procedure, the test results will be invalid Transcribe WHOLE word; NOT just target sounds Think about semantic cues for eliciting words See handouts for assignments and grading

25 Model of Speech Disorders
A speech disorder can be: phonetic (articulatory -- AI), phonemic (phonologic -- PI), or both (mixed – PAD) The broader term “speech disorder” encompasses all of these

26 Nature of Assessment Phonological 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

27 System Includes a set (or inventory) of different sounds produced by the child Adequate sound systems are symmetrical Sounds are contrastive in place, voice, and manner and function to signal differences in meaning Sounds function contrastively in all word positions (I, M, F)

28 Structure Refers to the rules and organization of the sound system
Specifies the distribution and combination of sounds in a language Examples: [ŋ] cannot occur # ___ [pl, bl, kl, gl] are permissable clusters WI, but not *[tl, dl]

29 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”

30 Relational Analysis Child’s speech compared to adult speech in a one-to-one comparison Differences between the two productions can be described in terms of SODA, phonological processes, PVM error patterns Only describes error sounds, therefore, often called an ERROR ANALYSIS 3rd phase of development is phonemic development.

31 Independent Analysis Child’s speech is described as a unique, independent, self-contained sound system NO comparisons made between child:adult systems Describes what the child DOES rather than what the child does NOT do (as in error/relational analysis)

32 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 ( words)

33 Two Frameworks for Phonological Analysis
Relational Analysis SODA Distinctive feature analysis Phonological process analysis PVM analysis (place,voice,mannor) Independent + Relational Analyses PPK (Productive phonological knowledge) Systemic phonological analysis of child speech (SPACS)

34 Phonological Process Analysis
Number of commercial tests available Dunn (1982): APP identified most patterns Non-standardized phonological process analyses Dunn (1982): non-standardized analysis was better than APP Relational analysis

35 List of Common Phonological Processes
Common to many commercial tests, but not tied to any one published test Categorized according to: syllable structure (deletion) processes and sound simplification (substitution and assimilation) processes See Table 3-1(d2l)

36 Choose the process that BEST describes error pattern
Considerations in completing non-standardized phonological process analysis Choose the process that BEST describes error pattern Ex: [ʃo] 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)

37 Process Ordering Sequential 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: /fɪʃ/ adult target sɪʃ apicalization tɪʃ stopping dɪʃ prevocalic voicing [dɪʃ] child’s pronunciation

38 Steps in completing a non-standardized phonological process analysis
Complete whole-word transcription of speech Transcribe target word according to AT Apply appropriate phonological processes in sequential manner until all aspects of sound change are accounted Summarize results Frequency of occurrence of predominant processes Process limitation/application Developmental information on processes Select appropriate tx goals

39 Select tx targets 3 perspectives Intelligibility perspective
most frequently occurring process(es) Developmental perspective Select earliest process(es) that should have been suppressed Combination

40 Advantages/Disadvantages of Phonological Process Analysis
Describes error patterns Terms are “user friendly” Disadvantage Time needed to complete analysis Selection of tx targets from summary sheet

41 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

42 Steps in completing a PVM analysis
Complete whole-word transcriptions Use black/red markers to color code productions on PVM form Mark each consonant with appropriate color in appropriate box on PVM form List phonetic inventory Summarize error patterns according to PVM (we’ll use PP) Select tx targets

43 Advantages/Disadvantages of PVM Analysis
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 Teachers like it Disadvantage does not identify assimilation errors


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