Stages of Speech Development
What stage of speech development consists of coos, goos, growls, and squeals?
Stage 2: Cooing & Laughter
Which 3 categories of consonants come in later?
Liquids, fricatives, and affricates
What is a contoid?
a non-phonemic "consonant-like" sound production.
What is the definition of infant speech perception?
When do we expect baby's first word to emerge?
Around their first birthday
What stage of speech development consists of reflexive vocalizations, nasals, and vegetative sounds such as cries, grunts, & burps?
Stage 1: Reflexive Crying & Vegetative Sounds
Which 3 categories of consonants come in early?
Stops, nasals, and glides
What is a vocoid?
a non-phonetic "vowel-like" sound production
When is a baby's hearing well developed?
20 weeks gestation, or 4 months prior to birth.
When will a child's production of consonant clusters be "adult-like"?
Age 9
What stage in speech development consists of squeals, yells, growls, and raspberries?
Stage 3: Vocal Play
What is the definition of Age of Mastery?
The age at which 90% of children produced the sound correctly in all three positions
Which nasal consonants are among the first to develop?
What is the definition of categorical perception?
The tendency to perceive speech sounds according to the phonemic categories of native language.
What is the definition of prelinguistic development?
All vocalizations prior to first actual words
At what stage in speech development does jargon appear, while canonical babbling & first words coexist?
Stage 5: Advanced Forms
Why do sounds in the initial position develop earlier?
Children use open syllable words first.
Which consonant is the last to form?
Theta, or /θ/.
(voiceless, interdental, fricative)
When does infant perception begin?
In utero, before they are born.
What do SLP's define as an actual first word?
a first word is a stable phonetic form, similar to the adult word that is produced consistently in a particular context.
At what stage of speech development do reduplicated & variegated babbling appear?
Stage 4: Canonical Babbling Stage
What is the definition of Age of Customary Production?
The age at which 51% of children tested produced the sound correctly in at least two positions
Which fricative is mastered earlier than all other fricatives?
/f/ - this is usually mastered at around age 3
Name 3 ways infant speech perception can be observed.
* Startle reflex
* Eye movement
* Head turn to localize noises
What is the First Fifty Word Stage?
the time from a child's first meaningful utterance to the time that the child puts two words together.