normal phonological development, speech sound learning and phonological processes, Flashcards
Infraphonological skills VS. Canonical babbling
Infraphonological skills – early infant vocalizations
(protophones)
VS.
Canonical babbling – infant vocalizations
comprising of adult-like sounds and syllables.
Infraphonological stages
(prelinguistic)
Stage 1:
Stage 1: phonation (birth - 2 months)
reflexive vocalizations: crying, fussing,
coughing, sneezing, burping.
Infraphonological stages
(prelinguistic)
Stage 2
Stage 2: Primitive articulation (1-4m)
New sounds (squeals, growls, coos/goos)
Infraphonological stages
(prelinguistic)
Stage 3
Stage 3: Expansion (3-8 m)
Period of vocal play and interaction
Infraphonological stages
(prelinguistic)
Stage 4
Stage 4: Canonical babbling (5-10m)
Normal phonation, repetitive patterns
Reduplicated and variegated babbling
May produce stops, nasals, glides, lax
vowels
The integrative stage
Onset of speech - final stage in infant
speech development (Oller, 2000)
may last up to 18 months
first meaningful word
Jargon
Gibberish production
At the end of this stage: infants combine
syllables/sounds and generate words
First Word:
vs Proto words:
Babbling transitions to First Words
First Word: consistent phonetic form in a particular context that is recognized as an adult form.
Proto words: consistent phonetic form in a particular context that is recognized as an adult form.
First Fifty Word Stage
the time from first meaningful utterance
(around 12 months) to the time when the
child begins to put two words together (18-
24 months)
Item Learning
during this time child
acquires word forms as unanalyzed units
rather than by contrasting phonemes
They are unaware of the contrasting phonemes
Holophrastic Period:
In this period they use one word or protoword to convey a complete idea
Phonetic variability
Trying out different production for different words— will say different.
Appropriate errors
The children present with an unstable pronunciation. They are trying different ways to phonate different sounds.
Limited Syllable Structures
They are using VC, CVC, CV
They cannot produce multisyllabic words
Bilabiales— firsts words
Fewer errors with vowels and consonants
Limited Sounds
Vowels [a] and [α] typically precede [i]
and [u].
Consonants [p], [b] and [m] are among
the earliest.
Individual Variation Exists
Fewer Errors with Vowels than with
Consonants
Preschool Acquisition of sounds
Ages:
Ages: (Smit, Hand,Frellinger,
Bernthal & Bird, 1990)
/m/ 3yrs
/n/ 3-3 ½ yrs
/p/ 3 yrs
/b/ 3 yrs
/k/ 3 ½ yrs
/g/ 3 ½ -4 yrs
/f/ 3 ½ yrs (I), 51/2 yrs (F)
/v/ 5 ½ yrs
/θ/ 6-8 yrs
/δ/ 4 ½ -7 yrs
/s,z/ 7-9 yrs
“sh” 6-7 yrs
/l/ 5-6 yrs (I), 6-7 yrs (F)
/r/ 8 yrs (“er” earlier than
initial l /r/)
Ages of acquisition cont.
Lots of variability in
Lots of variability in norms, pg. 158, 161
Table 4.3 (Smit et al.’s youngest group was
3 yrs and GFTA-2 was 2 yrs).
Depends on mastery criterion (75%, 85%,
95%), sound position in words, gender
Should be used as a reference, not as strict
guideline
Ages of acquisition cont.
Earlier sounds vs. Later sounds:
Earlier sounds vs. Later sounds: earlier sounds
should be mastered earlier, not just produced
earlier (table 4.4 – p. 161)
Age ranges for consonant mastery
Early sounds(2-4 yrs) – p, b, m, n, h, d. t. k, g, f, w, ɧ
Late sounds (5-7 yrs) - j, ʃ, ʧ, l, ʤ, s, r, v, z, ”th”
(voiceless and voiced)
Disagreement: j and ɧ could be early or later
Clinical Implications
Developmental research provides
the ability to target earlier sounds
before later ones.
Syllable structure limitations should
be taken into account when
structuring Treatment.
Phonological processes
are regularly occurring
simplifications of adult sound
productions that may affect classes
of sounds.
Phonological Processes
Advantages
use information to target processes,
not just individual sounds
Suppression of processes could help all
phonemes in a group, and in other
contexts
Phonological Processes
Use of processes more common before
Use of processes more common before age
of 3, if lingering after 3 may not be typical
Certain processes are more common in
normal speech (i.e., FCD) whereas others
are more atypical (i.e., ICD)
More than one process can influence a
single word (e.g. stop→[dop] – cluster
substitution and prevocalic voicing)