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frequent and varied sensory experiences
children form more neural networks in response to ____________ and _________
myelination of neurons
what do brains of babies have an exponential increase in
efficiency and speed of neurons to muscles causing improvement in gross and fine motor skills
what do babies increase of myelination of neurons improve?
they are pre-primed to learn new skills
what does a highly plastic brain mean
5
what age does plasticity of the brain really slow down
motor output
children have a limited capacity of _____________
1. the brain has a "child" like form of speech that develops over time into an adult like form
2. the brain has an adult like form of speech from birth, but motor constraints prevent children from achieving them until later ages
what are the 2 theories on speech
diary studies, cross sectional studies, and longitudinal studies
how do we study development of speech?
parent keeps journal of exactly what the child is doing. describe the development of what their child is doing
what is a diary study
take a certain number of children from different ages. cross sectioning them to each other and seeing what they are each doing at those ages
what is cross sectional studies
follow the same kids through their development. checking in to see what is happening at different points during their life
what is a longitudinal studies
we can't identify a disorder if we don't have a baseline understanding of what normal is
what is the clinical relevance of the different kinds of studies
milestone
when "most" children can achieve a skill. if it is missed then that is a red flag for pediatricians to refer
average
the mean age or of when a skill is achieved or the average competency of a skill
everything is smaller and lack of muscle strength
name two ways that the oral cavity, articulators, and/or speech systems might be different in infants than in adults
it is smaller, VF smaller and shorter, larynx is higher and smaller in their throat. higher pitch
what are some differences in anatomy and physiology for an infant for the laryngeal/phonatory system
oral cavity is smaller. tongue is larger in mouth than adult. smaller jaw and pharynx. less motor control
what are some differences in anatomy and physiology for an infant for the articulatory/resonatory system
perception is different. they learn how to perceive sounds in environment
what are some differences in anatomy and physiology for an infant for the auditory system
3 days old
a 1980 study found that infants of what age can distinguish their mother's voice from a strangers
newborns (0-3 months) communicate
what age is this: crying and vegetative sounds
3-6 month old
what age is this: cooing and gooing; crying and vegetative sounds continue; chuckling emerges
6-9 months
what age is this: early or marginal babbling; typically CV; other non-phonemic sounds like laughing and squealing
9-12 months
what age is this: canonical babbling; true vowels and consonants and CVCV syllable shapes
12-18 months
what age is this: true words emerge based on the consonants and vowels the child was already producing when babbling. more complex sounds and syllable shapes emerge as well as jargon
true CV, CVCV, and CV-C productions
what is considered canonical syllables
reduplicated and non-reduplicated
CVCV patterns can be divided into ___________ and ____________ babbling
reduplicated has same syllable (mama)
non-reduplicated has different syllables (badu)
what is the difference between reduplicated and non-reduplicated babbling
sounds in babbling
what can be a predictor of the sounds used in ealry words
late babbling
what is a predictor of late talking
1. must have some similarity phonetically to the target word
2. must be used consistently in the presence of a particular situation or object
what is the 2 criteria for true words
first words and phonetic inventories
what is closely linked at 1-2 years
first words usually have the same sounds that were used in babbling
how are first words and babbling similar
words that contain sounds NOT in their phonetic inventory
what kind of words do children 1-2 years old pay more attention to
4.4
a 2007 study looked at the average number of consonants in one year olds' consonant inventory. how many consonants did the average one year old have?
4-6; 10-15
the range of syllable initial consonants at age 1:0 ranges from _______ consonants, but grows to _________ by age 2
bilabial and alveolar consonants
what do early consonants tended to be
CV, VC, CVCV
what do early syllable shapes tended to be
motor constraints
why are phonological processes very common at age 1-2 years old
reduplication, final consonant deletion, and cluster reduction
what are some of the most common phonological processes
2-5
what is the peak age for referrals, identification and treatment
1. number of sounds in consonant inventory
2. intelligibility
3. percent of consonants correct
4. age of acquisition of phonemes
5. presence or absence of phonological patterns
what are the 5 things considered normal from a variety of domains
/p, b, t, d, k, g, m, n, ŋ, w, j, h, f/
what are the early 13
/v, dʒ, s, tʃ, l, ʃ, z/
what are the middle 7
/r, ð, ʒ, θ/
what are the late 4
dialect of english, age range tested, and criteria for correctness
many studies have been done to measure when certain sounds should develop but they differ in
p
according to age of acquisition, what consonants should you have a 2 years old
b, t, d, k, g, m, n, f, h, y, w, ŋ
according to age of acquisition, what consonants should you have a 3 years old
v, s, z, sh, ch, j, l
according to age of acquisition, what consonants should you have a 4 years old
ð, ʒ, r
according to age of acquisition, what consonants should you have a 5 years old
θ
according to age of acquisition, what consonants should you have a 6 years old
intelligibility
rating of how much of a child's speech is able to be understood, typically by an unfamiliar listener.
accuracy of phonemes, rate of speech, suprasegmental, concurrent language, voice, or fluency disorders
what can intelligibility be based on
true
true or false: some kids have very inaccurate phonemes but are relatively intelligible. some kids have relatively accurate phonemes but seemingly terrible intelligibility
caregiver
can a stranger or caregiver understand the child better
50%
at 2, a child should be ________ intelligible to strangers
75%
at 3, a child should be ________ intelligible to strangers
90%-100%
at 4, a child should be ________ intelligible to strangers
as an estimated percentage
how do we informally rate intelligibilty
percent consonants correct (PCC)
a measure of accuracy and severity not intelligibility
70%
at age 2, PCC should be around ___________
75-85%
at age 3, PCC ranges from ________
88-93%
at age 4, PCC ranges from_________
# of correctly produced consonants in a sample / total # of consonants in a sample
how do you find the PCC
phonological patterns
systematic patterns seen in typical development that simplify verbal output; thought to be a developmental step that allows children to be understood while expanding their vocabulary despite motor limitations
motor, neurological, or language maturity
why do phonological patterns naturally go away by a certain age
deviant
what are patterns that persist past the age of assimilation are considered
whole classes of sounds not just one phoneme
what does the treatment of phonological patterns target
phonological processes
are persistent patterns called phonological patterns or processes
fronting, stopping, cluster reduction, final consonant deletion, gliding, reduplication, weak syllable deletion
what are typical phonological patterns
fronting
phonemes made at the back of the mouth (velar) are produced at the front of the mouth (alveolar)
stopping
fricative consonants are produced as stop consonants
cluster reduction
2 or 3 element consonant clusters are produced as singletons
final consonant deletion
CVC words (closed syllables) are produced as CV words (open syllables)
gliding
liquid consonants are produced as glide consonants
fronting
what is this an example of: "Bad" for "bag"
stopping
what is this an example of: "pish" for "fish"
cluster reduction
what is this an example of: "top" for "stop"
final consonant deletion
what is this an example of: "ba" for "ball"
gliding
what is this an example of: "yemen" for "lemon"
reduplication
repetition of an initial syllable
reduplication
what is this an example of: "wawa" for "water"
weak syllable deletion
an unstressed syllable is deleted in a multisyllabic word
weak syllable deletion
what is this an example of: "nana" for "banana"
backing, initial consonant deletion, strong syllable deletion
what are atypical phonological patterns
backing
phonemes made at the front of the mouth (alveolar) are produced at the back of the mouth (velar)
backing
what is this an example of: "cop" for "top"
initial consonant deletion
CVC words (closed syllables) are produced as VC words
initial consonant deletion
what is this an example of: "up" for "cup"
strong syllable deletion
a stressed syllable is deleted from a multisyllable word
strong syllable deletion
what is this an example of: "na-sore" for "dinosaur"
86.4%
according to a 2001 study, up to _________ of consonant clusters are mastered at age 3
simple consonant clusters
which develops first simple 2 consonant clusters or complex 3 consonant clusters
3
what age should vowel production be accurate
motor speech disorders
typically vowel errors or vowel distortions are a red flag for _______________
6:11
when do the late 4 sounds develop
1. predicative of reading and writing
2. often difficult for kids with SSD
3. low SES is a risk factor for development
for ages 5+ what are 3 phonological awareness that develop
detection, segmentation, deletion, blending
what are the 4 sub skills of phonological awareness for 5+
detection
what phonological awareness is this: do these words rhyme? mat and rat
segmentation
what phonological awareness is this: (/b/ /a/ /t/) then they say the word
deletion
what phonological awareness is this: say butterfly but then ask what happens when i take away the work fly