speech sound development and disorders Flashcards
what is the difference between articulation and phonological approaches
articulation looks at acquisition of individual phonemes and emphasizes motor speech control
phonology looks at acquisition of sound patterns and focuses on the rules of the sound system of a language
what are unmarked sounds
those that appear to be natural and are easier to acquire
what are marked sounds
sounds that are less natural and tend to be acquired later
what does phonemic mean
abstract system of sounds
what does phonetic mean
concrete production of certain sounds
what is the behavioral theory of speech sound acquisition
based on conditioning and learning
focuses on describing observable and overt behavior
speech formed by interaction with the caregiver
what is the natural phonology theory
- innate processes that simplify the adult target word
2. children suppress processes that don’t occur in their language
what is the generative phonology theory
- phonological descriptions are dependent on info from other linguistic levels
- phonological rules map underlying representations onto surface pronunciations
when do infants lose the ability to discriminate sounds that are not in their language
12 months
what are Oller’s stages of development
- phonation stage: birth to 1 month. Reflexive soundds
- cooing: 2-4 months: similar to /u/
- expansion: 4-6 : playing with sounds. Growls, squeals, yells, raspberries
- canonical or reduplicated babbling 6-8 months: string of CV mamamama
- variegated or nonreduplicated babbling: 8-12 month: variety of consonants and vowels
what is the typical acquisition of speech sounds
- vowels
- nasal consonants
- stops with /p/ earliest
- glides
- liquids
- fricatives with /f/ first
- consonant clusters with 2 elements
- consonant clusters with 3 elements
what are the early phonemes
m,n,p,h, w, b,k,g
what is the percentage of intelligibility for a 2 year old
60-70%
what is the percentage intelligibility for a 3 year old
75-80%
what is the percentage intelligibility for a 4 year old
90-100%
what are the substitution phonological patterns
- vocalization
- gliding
- velar fronting
- stopping
- depalatization: alveolar affricate for an affricate. wats for watch
- affrication: affricate in place of a fricative or stop. chip for sip
- deaffrication
- backing
- glottar stops
what are assiilation patterns
- reduplication
- regressive assimilation or consonant harmony:influence of later sound on earlier
- progressive assimilation: earlier sound influences later one
- voicing assimilation: devoicing or voicing
what are syllable structure patterns
- weak syllable deletion
- final consonant deletion
- epenthesis: schwa inserted in consonant cluster
- consonant cluster reduction
- diminuization: addition of /i/. do to doggy
- metathesis: sounds in reversed order also called spoonerism
what is linear phonology theory
- speech segments are arranged in a seqential order
2. all sound segments have equal value
what is a functional disorder
no underlying physical cause found
also called speech sound disorder
what are risk factors for speech sound disorder
- more boys than girls
- can be of any intelligence
- having older siblings to copy
- low socioeconomic status
- can affect language and literacy
what is labialization
sounds are produced with excessive lip rounding
what are pharyngeal fricatives
fricatives such as /h/ produced in the pharyngeal area
what are frontal lisps
sibilants produced with tongue tip too far forward or against teeth
what is class I malocclusion
when arches are aligned but some individual teeth are misaligned
how are oral motor coordination skils evaluted
diadochokinetic rate
what is an orofacial myofunctional disorder
any anatomical or physiological characeristic of structures that interferes with normal speech, dentofacial, or psychosocial development
2. includes swallow, labial and lingual rest, and speech posture differences
what are characteristics of tongue thrust
- anterior open bite
- poor resting posture of tongue
- errors in production of s, z, palatal fricatives and affricates
- tip dental sounds t, d, l, and n, may be misarticulated due to weak tongue tip musculature
- SLPs work as a tem with dentist, and physician
how does hearing loss affect articulation
- omission of high frequency voiceless sounds is common
2. may use final consonant deletion, stridency deletion, and fronting