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Umbrella term: Speech Sound Disorders (SSDs)
Includes Articulation Production, Phonological Representation, Prosody, and Auditory Perception.
Functional/No Known Cause SSDs
Divided into Articulation (motor aspects) and Phonology (linguistic aspects).
Organic/Acquired Motor/Neurological SSDs
Dysarthria (Execution) & Apraxia (Planning).
Organic Structural SSDs
Cleft Palate, Orofacial Anomalies, and Structural Deficits due to Trauma or Surgery.
Organic Sensory/Perceptual SSDs
Sensorineural Hearing Loss.
Articulation Development
Development of the motoric ability to produce speech sounds.
Phonological Development
Development of the knowledge of when, where, and how to use sounds.
Articulation Delay
Mastering phonemes at a later age than normally developing children.
Articulation Disorder
Mastering phonemes in an order different than normally developing children.
Phonological Delay
Eliminating the use of phonological patterns at a later age than normally developing children.
Phonological Disorder
Eliminating the use of phonological patterns in an order different than normally developing children.
Phonological Awareness
The ability to detect and manipulate sounds in oral language (e.g., segmenting and blending).
Phonological Patterns
Patterns of speech sound errors (e.g., Final Consonant Deletion).
Five-Way Scoring (SODA)
Substitution, Omission, Distortion, Addition, and Correct.
Phonotactic Constraints: Inventory Constraints
Limit which phonemes are or are not permitted in a language.
(e.g. The postalveolar clicks /!/ is not permitted in English but is permitted in Xhosa)
Phonotactic Constraints: Positional Constraints
Limit where phonemes are permitted in words
(e.g., /h/ not in syllable final position).
Phonotactic Constraints: Sequential Constraints
Limit number of phonemes in a syllable and how they combine.
(e.g. Syllable initial /tl/ is permissible in Polish but not in English)
Morphophonemic Rules: Plural s (/z/)
Used when the final sound is voiced.
Morphophonemic Rules: Plural s (/s/)
Used when the final sound is unvoiced.
Morphophonemic Rules: Plural s (/ɪz/)
Used when the final sound is /s, z, tʃ, dʒ, ʃ, ʒ/.
Risk Factors Definition
Common characteristics or traits within a group that may increase risk of having an SSD but do not directly cause it.
Child Risk Factors for SSD
Gender (boys more likely), pre/postnatal difficulties, and hearing issues (CHL).
Family Risk Factors
birth order (later birth positions)
Parent Risk Factors
hx of speech or lang probs in the family, low maternal education level
Known Causes of SSD
Genetic causes (down syndrome, rett syndrome, fragile x syndrome), craniofacial anomalies, SNHL, cognitive impairment, ASD, and motor impairment (cerebral palsy).
Behavioral Impacts of SSD
Preschoolers may be unaware and experience communication breakdowns and frustration; school-age children may feel embarrassed or sad when speaking in public settings.
Educational Impacts of SSD
Increased literacy difficulties and higher likelihood of dropping out or not attending higher education.
Social Impact of SSD
Poor peer relationships, lower self-esteem, and increased bullying.
Vocational Impact of SSD
Greatest rate of unemployment difficulties and trouble keeping a job due to many jobs requiring skilled communication
Struggles families might face if child has a SSD
Difficulty understanding their child's speech, might be dismissed by healthcare providers and not receive services, may worry about kid being left out, difficulty scheduling times for therapy, feel left out of the goal/decision making progress in therapy.
What are our roles in service delivery other than conducting assessments and inventions?
Counsel families (you are not the reason this happened) and include them in goal making and decision making processes.
Childhood Apraxia of Speech Characteristics
o Same word pronounced several ways
o Omissions in initial position
o Centralize vowels into a schwa
o Number of errors increase as length increases
o Automatic speech easier than on demand speech
o Receptive language better than expressive language
o Rate, rhythm, and stressed disturbed with groping for placement
Dysarthria Characteristics
o Decreased strength of speech musculature
o Difficulty with involuntary motor control for chewing and swallowing
o Distortion Errors
o Less precise in connected speech than individual words
o Rate, rhythm, and stressed disturbed
o Monotone
o Hoarse, harsh, hypernasal speech
Inconsistent Speech Disorder Characteristics (phonological)
o Omissions in final position
o Vowel distortions not common
o Prosody okay
o unpredictable errors
Markedness Implications
Marked sounds imply natural sounds.
1. Fricatives imply stops
2. Affricates imply fricatives
3. Consonants imply vowels
4. Clusters imply singletons
Factors that influence the child's order of acquisition of speech sounds: Word Frequency
high-frequency words are more accurate
Factors that influence the child's order of acquisition of speech sounds: Neighborhood Density
The number of words that differ by one phoneme; children recall more words from dense neighborhoods.
Factors that influence the child's order of acquisition of speech sounds: Phonotactic Probability
The likelihood of occurrence of a given sound or pair of sounds in a language.
Factors that influence the child's order of acquisition of speech sounds: Functional Load of a Phoneme
The amount of work that a phoneme does in distinguishing words in a language.
Factors that influence the child's order of acquisition of speech sounds: Vocabulary
as children learn more words their speech improves
Factors that influence the child's order of acquisition of speech sounds: Phonetic Structure of Words
the longer the word length, the more likely children will have difficulties producing it
Factors that influence the child's order of acquisition of speech sounds: Phonetic Complexity of Sounds
how difficult a sound is to produce
Factors that influence the child's order of acquisition of speech sounds: Phoneme Input Frequency
represents how often a phoneme occurs in a given language (words that contain th used frequently so high input frequency)
Natural Features
easier to articulate, more common within and across languages, usually early acquired sounds.
Marked Features
phonetically more complex, less common within and across languages, usually later acquired sounds.
Speech Disorders Classification System (SDCS)
Aims to classify the causes of SSD based on typology and etiology.
Dodd's Differential Diagnosis System
A descriptive-linguistic framework categorizing SSD into artic delay, phonological delay, and consistent/inconsistent disorder.
Psycholinguistic Framework
A processing-based framework to describe speech/literacy skills by identifying where the breakdown occurs (input, storage, output).
ICF-CY Framework
A holistic framework considering environmental and personal factors as barriers or facilitators to functioning. less medical model focused, more impact and client wishes focused.
Cross-Sectional Studies and Cons
use of same testing protocols for groups of children of same characteristics (normative sample); individual variation is obscured and data collection is rarely naturalistic.
Longitudinal Studies Pros and Cons
document speech acquisition of a group of children over time
o Number of children and length of time vary
o Changes occur as the child develops
o Account for individual variations
Comparative Studies and Pros
compare two groups to test hypotheses and theories of children's speech acquisition
o Enhance understanding of speech acquisition
o Useful for appreciating the relationship between groups or concepts
How do cross-sectional studies vary in their procedural methods? What precautions should SLPs take when assessing a child's speech skills?
They can vary in age of child, number and method of elicitations, scoring of responses, amount of cueing, populations included. They should consider what the test is actually testing and what this is telling you.
Nasals: are we expecting changes and what would they be?
NO
- b/m
- d/n
- g/ŋ
Stops: are we expecting changes and what would they be?
Manner? NO
Voicing? SOMETIMES
- p/b
- t/d
- k/g
Place of articulation? YES
- t/k
- d/g
Glides: are we expecting changes?
NO
Fricatives: are we expecting changes and what would they be?
/h/? NO
Others? YES
- p/f
- b/v
- t/s
- d/z
- t/θ
- d/ð
- t or s/ʃ
- d or z/ʒ
Liquids: are we expecting changes and what would they be?
YES! very often
- w or j/l
- w/r
Affricates: are we expecting changes and what would they be?
YES
- t or s or ʃ/ tʃ
- d or z or ʒ/ dʒ
Expected Intelligibility at Age 3
Approximately 75%.
Expected Intelligibility at Age 4
Approximately 90%.