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ASHA
American Speech and Hearing Association
Form
phonology, morphology, syntax
Content
Semantic
Use
pragmatics
What constitutes an impairment?
significant deficit in 3 positions:
(1) normative
(2) neutralist
(3) hybrid
Language Disorder versus language difference
Language disorder: difference & disturbance producing handicapping condition in language
Language difference:
e.g., accents
contexts
normative
deficit in learning to talk, use, or understand language relative to environmental expectation
Neutralist
deficit when a child scores significantly below standardized test expectation
hybrid
deficit when a child scores significantly low on standardized tests AND perceived to having a communication problem
4 models
(1) systems model
(2) categorical model
(3) descriptive-developmental model
(4) specific disabilities model
Systems Model & Implications
- problem with child, and the relationship between child and environment
- change the environment to match the needs of the child
Categorical Model & Implications
- etiology of language disorders linked to syndromes of behaviour
- diagnostic criteria of disorder (cognitive impairment, autism) plays a causal role
Weaknesses of Categorical Model
doesn't always explain child's language behaviour
Specific Disabilities Model & Implications
Profiles strengths & weaknesses in areas believed to influence language development
- teach child's strengths to remediate weaknesses
Weaknesses to specific disability model
-bottom-up process
- no evidence that remediating strengths improves communication functions
Descriptive-Developmental Model
describes child's current level of language function in terms of form, content, & use
- uses typical language developmental sequence as a guide for teaching language
implications of descriptive-developmental model
goals of language intervention are using language skills just above child's current level of functioning
3 levels of functioning according to the ICF
(1) impairment
(2) activity limitation
(3) participation restriction
(lecture 2)
Why do we assess
(IBGC)
(1) to identify
(2) to establish baseline function
(3) to establish goals for intervention
(4) to measure change in intervention
Planning the Assessment
age & functional age
sensory system
caregiver concerns
psychological functioning
interests & materials
activity level
attention span
Inverted triangle for assessment process
Tier 1:
- questionnaire, interview, referral
Tier 2:
- observation
Tier 3:
- formal testing
Tier 4:
- conversational language sampling
5 questions to ask caregivers about language functioning
(1) What is your main concern
(2) when did you first become concerned? was onset gradual or sudden?
(3) Has your child had any previous therapy?
(4) How does your child perform socially? in school?
(4) Have other people noticed/commented on it?
Formal Tests
- More specific information is obtained
- help to identify whether a child has a language delay or impairment
- eligibility for services
- provide structured approach to understanding deficits
Formal tests: syntax comprehension & production
comprehension: pointing to pictures & following directions:
production:
elicited imitation, saying what the experimenter says
Formal testing: morphology
- picture pointing for bound morphemes
- close sentence completion tests (allow for child to complete a sentence)
Examples of Formal Tests:
- CELF-P
- TOLD-3P
- PLS-4
- TACL-3
expressive vocabulary task
picture naming
comprehension of vocab task
picture pointing, explaining figurative language, defining words
word relationships task
synonyms & antonyms
Assessing semantics
tests of word-finding ability
- timed picture naming test
ability to express and understand concepts about objects and events
Formal test of semantics
- PPVT-III
- EOWPVT
- CDI
- PLS-4
- TWF-2
Collateral Areas of assessment
1. Hearing:
- comprehension precedes production
2. Motor-Speech abilities:
- assess and support anatomical & physiological capacity for speech
Norm-referenced tests
standardized tests that compare an individual child's score to the average score of others their age
determines whether child's scores are within range of "normal" child's scores
reliability of norm-referenced scores
overall, consistent and reliable
- test-retest
- inter-rater
- internal consistency
- alternate forms
- split-half
validity of norm-referenced scores
- construct (testing what it needs to test)
- content (all items are appropriate to testing)
- criterion (multiple tests show similar results amongst children)
Advantages of norm-referenced tests
- objective
- standardized comparisons
- widely accepted
disadvantages of norm-references tests
- lack cultural sensitivity
- not individualized
norm-referenced scores
1. standard
- how far child is from the mean (# of SD)
2. percentile
- percentage of the norm population scored lower than client
3. equivalent
- mean score of a group of children in a particular age/grade
(lecture 3)
Why are criterion-referenced tests used in child language assessment
more naturalistic
individualized
used to set goals & evaluate progress
compare child's performance to past performance
non-standardized
can help child achieve a certain level of performance
Rules for criterion-referenced tests od comprehension
1. avoid over interpretation
2. control linguistic stimuli
3. specify appropriate response
-a. naturalistic
-b. contrived
4. elicit multiple response
example activity for criterion-referenced assessment of a child's comprehension of: objects
search tasks, perform actions, set of common objects
- "put the red block in the red box"
example activity for criterion-referenced assessment of a child's comprehension of: 2-3 term semantic relations
response to questions, observation of conversation, role plays
example activity for criterion-referenced assessment of a child's comprehension of: locatives
search task, games & routines, body placement tasks, perform actions
- "simon says!"
Example of elicited imitation
provide a model of speech we want children to imitate
-"repeat after me"
- "say what i say"
Example of elicited production
tempting child to say a specific thing by setting up a context where saying the target form is appropriate
- role playing, questions, stories
threats to validity of a language sample
(1) productivity - utterances produced
(2) intelligibility -level of difficulty in understanding
(3) representativeness
(4) reactivity - children respond differently to different stimuli
increasing the likelihood of obtaining a representative language sample
(1) spontaneity
- less clinician control, less conscious child
(2) variability of context
- free play & scripted situations
- in a clinic, home, school, daycare
3 contexts clinicians might use to get language samples
1. free play
2. stories
3. role playing
Guidelines to follow when collecting a language sample
(1) parallel play & parallel talk:
- doing what you want the child to do in hopes that the child will mimic
(2) imitate verbalizations
- creates a fun environment, enabling the child to do better
(3) move into interactive conversation
- allow more pauses to allow child to answer, follow child's lead, use utterances slightly longer than the child's
eliciting linguistic forms (plurals) during a language sample?
talk about a mock birthday party!
eliciting linguistic forms (labeling) during a language sample?
SLP points to a new object and says "oh look!"
to assess presupposition?
clinicians tailoring language to child's needs
- barrier tasks: one person gives directions/description to the other person on the other side of a barrier
to assess discourse organization?
- role play phone convos
- ask a child to tell a story or describe their fav thing
3 criterion-referenced methods for production are used together through...
(1) language sample
(2) elicited production for structures not seen (use of negatives and questions)
(3) if a child still doesn't produce form, try elicited imitation
(lecture 4)
Referential semantics
child's use of individual words
relational semantics
meaning relationships - expressed by words in relation to aspects of objects, events, environment, or to other words
more difficult to assess
analyzing referential semantics
TTR
- to see if a child has limited words
- normal is .42-.50
- ratio of number of different words to total number of words
Word-finding
- assessing for pauses, repetition, frequent pronouns, etc.
- impaired ability to generate specific words in a situation
analyzing relational semantics
categorization activities
- over/under extension & incorrect use
- literate vocabulary
figurative language
- evaluation of figurative language
- helps see if child actually understands figurative language
semantic relations
- frequency of word combinations
- range of semantic categories
2 ways to analyze length & complexity of utterances
MLU
T-Units
MLU assessment
total # of morphemes / # of utterances in sample (100)
MLU average: 3.0-4.0
to determine variation, take the upper & lower bound length to see the most consistent use of sentences
T-units (minimal terminal units)
1 main clause (splits at 'and,' 'but')
- divides sample into T-units & count # of words in each T-unit
- divide by total # of T-units, equals average # of words per T-unit
morphological analysis
Brown's 14 grammatical morphemes
% of correct: # of correct appearances / total;# of obligatory contexts
Type of negation words used
no
not
don't
can't
won't
negative forms of verb to be
negative prefixes (un, non, ir)
Placement of negation word
outside the utterance
embedded within the utterance
syntactical stages-negation
stage 1:
- no & not used interchangeably outside of utterance
stage 2:
- don't & can't acquired
- mostly interchangeable with other negations
stage 3:
- negatives begin to appear embedded within the utterance
stage 4:
- negatives appear with an auxiliary
stage 5:
- more complex negative/negation words acquired (nobody, wouldn't)
subject/auxiliary in a question:
e.g., "she is happy?" where it is supposed to be "is she happy?"
Analyzing children's language use (functions) at utterance level:
examine in variety of situations & partners
rate each utterance for intention expressed
disruptions in a language sample
noting the length of pauses
compare to normative data
what is considered when analyzing for disruptions in a language sample?
the frequency of disruptions & frequency for each category of disruptions per 10 pauses
identifying disruptions by type
note variations
'typical' disruptions
<2 pauses of 2 seconds or more; fewer than 2 repetitions; fewer than 6 disruptions overall
types of disruptions (mazes)
(1) filled pause
(2) repetition
(3) revision
Evaluating utterance appropriateness
judging relative to age, race/ethnicity, SES, gender, context, etc.
Language Disorder
deficit in the comprehension/production of language, which affects the form, content, or use of language
clinical issue caused by underlying factors (cognitive delays, neurological impairments, or developmental condition)
-intrinsic issue of language development
Language Difference
difference occurs when a child's language characteristics are influenced by their cultural or linguistic background
not a clinical impairment
proficient in their native la nguage
CALPA Position Statement for assessment
identification of disorder made in the first language; assessment is culturally/linguistically appropriate; consideration of societal factors impairing language proficiency
Dynamic Assessment
evaluating how clients learn
Why are clinicians encouraged to use dynamic assessment?
focuses on learning potential rather than static knowledge
evaluates how well a child can learn & apply new skills when provided with support
key reasons to use dynamic assessment
(1) reduces cultural & linguistic bias
(2) differentiates disorder from difference
(3) focus on the learning process
(4) flexibility in approach