Child language acquisition Flashcards
Babies and sight
sight develops gradually in infancy
fully developed by the time they reach 3-5 years old
at birth, an infant can detect light and motion, make out faces and large shapes
up to 3-4 months, they can distinguish between colours, focus on smaller objects up to 3 feet away and watch activity around them
Babies and hearing
born with excellent hearing - hear sounds in the womb
have been exposed to sounds of mothers and other family members
from birth, babies are startled by loud noises
a baby recognises and calms to parent’s voice by 3 months
6 months - can turn eyes / head towards new sound.
when can a baby carry out reflexive vocalisations or vegetation and what is it?
0-2 months
natural sounds such as crying, burping, coughing, sneezing or grunting which are reactions to hunger, discomfort or simply physical sounds
when can babies coo and what does this mean?
2-4 months
greater control over sounds that they make, babies begin to laugh and coo
cooing consists of sounds made from the back of the mouth (K,g)
when can babies vocal play and what does this mean?
4-6 months
testing vocal equipment - children play with loud and soft, high and low
squeals, yells, growls
when can babies babble and what does this mean?
6 - 12 months
repeating patterns of syllables (consonant - vowel)
- reduplicative - babababababa
- variegated - bagaba
- contraction - child reduces number of phonemes
- expansion - number of phonemes the child uses increases
when can babies make proto-words and what does this mean?
10 - 12 months
beginning of ‘sense’ words. They may not resemble real words but they still mean something. - ‘Gama’ - grandmother
what are plosives?
blocking part of the mouth so that no air can pass through.
pressure increases behind place where it is blocked.
Air is allowed to pass through again and sound is created.
What are Fricatives?
produced by forcing air through a narrow channel made by placing two articulators close together
what are affricates?
affricates begin as plosive but upon release become fricatives
what are nasals?
where air escapes through nose but not through the mouth
what are approximants?
involve articulators approaching each other but not enough to create turbulent airflow. Approximants fall between fricatives, which do produce turbulent airflow and vowels which don’t.
what is phonetic expansion?
during pre-verbal phase, children increase number of different phonemes they use.
what is phonetic contraction?
at around 9-10 months, children begin to stop using certain phonemes - the ones they do not recognise as being necessary to their native language
what is consonant cluster reduction?
where there are two or more consonants in a cluster, speakers will reduce it to one consonant (snow - no)