Baby-Toddler Noises
- Details
- Created: Tuesday, 27 August 2013 19:35
- Updated on Saturday, 25 July 2020 14:35
Vegetative Sounds
(Bodily Functions) Burps, hiccups, sneezes, gulps, reflexive grunting, etc.
In children later diagnosed with CAS, preliminary evidence (Overby and Caspari, 2013) suggests that there may be:
-
an unexplained continued appearance of vegetative sounds.
Fixed signals
(Recurring motor sequences that don’t vary across individuals) Laughs, cries, moans
In children later diagnosed with CAS, preliminary evidence (Overby and Caspari, 2013) suggests that there may be:
-
possible extended use of fixed signals, and,
-
fewer sounds in children exhibiting more fixed signals.
Protophones
Purpose varies. Protophones are speech-like, but not "transcribable". These include quasivowels and marginal babbling.
12 Months: Typical development
In children later diagnosed with CAS, preliminary evidence (Overby and Caspari, 2013) suggests that:
-
protophones have similarities to and differences from typical children;
-
protophones tend to emerge when expected (first months);
-
protophones continues into the period when resonant productions (babbling) should emerge (i.e., 6-12 months);
-
protophones dominate at 14-16 months, when fully resonant productions should dominate.
Resonant Productions
Fully resonant productions are "transcribable". These include fully resonant vowels, resonant consonants, canonical babbling, true words.
14 Months: Typical development
Canonical Babbling: Typical development
Variegated Babbling: Typical development
In children later diagnosed with CAS, preliminary evidence (Overby and Caspari, 2013) suggests that there may be:
-
limited babbling, and in its place, reduced syllable shapes (dominated by vowels and CV);
-
lack of diversity in place, manner and voicing;
-
'differences' in resonant productions at 2 years (compared to typically developing children);
-
volubility (amount of verbal output) is at around 1/3 to 1/5 that of typically developing children;
-
dependency on V and CV syllable structures with CVC absent.
Speech
Meaningful speech or made-up words
24 months made-up words: Typical development
30 Months: Typical development
References
Bowen, C. (2015). Children's Speech Sound Disorders (2nd ed.). Oxford, Wiley-Blackwell, page 82.
Overby, M. & Caspari, S. S. (2013). Observed Early Characteristics of CAS via Video Research. Paper presented to the CASANA Conference, Denver, Co.
Overby, M. & Caspari, S. S. (2015). Volubility, consonant, and syllable characteristics in infants and toddlers later diagnosed with childhood apraxia of speech: Pilot study. Journal of Communication Disorders, 55, 44-62.