lecture 5 prelinguistic language development Flashcards
what are the different chunks of language that we learn
messages
sentences
words
speech sounds
define messages
pragmatics of the language - study of language in terms of context
define sentences
grammar of language ie the syntax/morphology - way the shape of the word can change its meaning
define words
lexical level of language ie the semantics
define speech sounds
difference between the sounds we make and the sounds that convey meaning
phonology - language sounds
phonetics - vocal sounds
different phonemes convey different meanings
how does knowledge of language and meaning develop
progressive - small to large units ie better at phonemes at start of development
not completely the case as suggests define phonemes in terms of meaning
stages of language aquisition
communicative crying (pre) babbling(pre) reduplication (pre) one word two word multi word narrative
moan et al high amp sucking and native lang from birth
from 2 days old infants of monolingual mothers display high amp sucking to native language
what is high amplitude sucking
used to look at child understanding from birth -where cant voice experience/preference
habituate to an auditory stimulus then change in some way - see if the infant recognizes and change in the sound - if does, sucking increases
what is infant directed speech preference
adults speak to infants in short sentences, high pitched, exaggerated expressions, clear pronunciation, distinct pauses
do to catch babies attention
what is categorical perception
there are distinct categorical differences between the sounds we hear in language - subtle changes in phonemes are changes in the smaller form of a word to change meaning and differ across languages
young infants sensitive to a range of speech categories in native and non native language up to 6-8 months
categorical perception in adults
speech sounds vary in phonetic featuresi.e. /ba/ /pa/ vary by VOT
can artificially synthesize sounds then ask what hear - sharp discrimination at 25-30ms VOT - not linear
eimas et al categorical perception in infants
habituated 1 and 4 months to /ba/
control - hear ba both conditions - no change in HAS
differ - hear /pa/ from other side of cat boundary - increase in recog that diff
same - hear different target of /ba/ (same cat boundary) - equal step change but quickly habituate
why can infants detect non native language contrasts while adults cant
early in life, infants do not know own native language so must recognise all contrasts incase necessary in native language
adults aware of native so stop recognising contrasts not useful for comprehension of own language
werker et al 1981 when does native lang environment change infantile speech perception
compared english adults, english infants and hindi adults ability to discriminate hindi speech sounds
head turn procedure - condition to turn head when hear change in sound (reward by toy)
test english infants ability to distinguish hindi /tha/ vs /dha/ same level as hindi adults
6-8m universal listeners
english adults cannot distinguish