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Prelinguistic development. Developmental periods 1;0 preverbal stage 1;0 – 1;6 one word stage 1;7...
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Transcript of Prelinguistic development. Developmental periods 1;0 preverbal stage 1;0 – 1;6 one word stage 1;7...
![Page 1: Prelinguistic development. Developmental periods 1;0 preverbal stage 1;0 – 1;6 one word stage 1;7 – 2;0 two-word stage 2;0 – 3;0 multiple word utterances.](https://reader030.fdocuments.in/reader030/viewer/2022032518/56649cca5503460f94992e29/html5/thumbnails/1.jpg)
Prelinguistic development
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Developmental periods
1;0 preverbal stage
1;0 – 1;6 one word stage
1;7 – 2;0 two-word stage
2;0 – 3;0 multiple word utterances
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Early speech recognition
Two months-old infants:
• recognize their mothers’ voice• are able to differentiate speech
sounds from noises• are able to distinguish different
types of languages High-amplitude sucking procedure
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Early speech recognition
Two months-old infants are able to
distinguish French from Russian,
but fail to differentiate French from
Spanish.
High-amplitude sucking procedure
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Early speech recognition
High-amplitude sucking procedure
• Stressed-timed languages• Syllable-timed languages• Mora-timed languages
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Categorical perception
Up to the age of 0;7 infants are able to recognize many allophonic distinctions that adult speakers may not be able to hear.
[Werker and Tees 1984]
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Categorical perception
[thOt] top aspirated
[stOp] stopplain
/p t k/ → [ph th kh] / #__, V'
[p t k] elsewhere
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Categorical perception
Once infants have tuned into the phonological system of their mother language, they loose the ability to discriminate speech sounds they were able to discriminate previously.
[Werker and Tees 1984]
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Categorical perception
[t]
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phoneme /t/
Categorical perception
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Categorical perception
phoneme /t/phoneme /d/
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attractor
Categorical perception
phoneme /t/phoneme /d/
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attractorattractor
Categorical perception
phoneme /t/phoneme /d/
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attractor
Categorical perception
phoneme /t/phoneme /d/
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Segmentation of the speech stream
[demse .. tyfesalesp … esbedlaesdnd … sj … deneb]
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• Phonological cues• Distributional cues
Segmentation of the speech stream
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Phonological cues
Peter Jusczyk
The discovery of spoken language
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Intonation and pauses
Yesterday … after we had lunch … with Sally … we
went to the movies.
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Stress
ADULT: What’s that?CHILD: That’s a ‘raffe’.
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Stress
ADULT: What’s that?CHILD: That’s a ‘nana’.
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Stress
'apple
'happy
'unhappy
'newspaper
Typical placement of English word stress:
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Stress
Mother: Behave!
Child: I’m heyv.
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Phonotactic constraints
English syllable structure
CCCV
VCCC
Phoneme sequences: [g] [d]
… bigdog … = big / dog
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Allophonic variation
/t/ → [th] top
→ [t] stop
/l/ → [l] light
→ [à] call
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Allophonic variation
gadfy… sathas … teys … oàart … tenitre
word boudaries
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Distributional cues
Nonce words: tupiro
golabu
bidaku
padoti
Saffran et al. 1996
Subjects: 8 months-old infants
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Distributional cues
tupiro – bidaku – padoti – bidaku – golabu …
Saffran et al. 1996
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Distributional cues
Condition1: tupiro-bidaku-…
Condition 2: da-pi-ku-ro-tu-…
Saffran et al. 1996
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Headturn procedure
green light
light + auditory stimulus
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Distributional cues
Saffran et al. 1996
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Distributional cues
tu-pi-ro – bi-da-ku – padoti – bidaku – golabu …
transitional probabilities
100% 25%
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Distributional cues
Condition 1: 100-100-25-100-100-25 …
Condition 2: 8.3-8.3-8.3-8.3-8.3 …
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Function words
How do children acquire their native language? My research focuses on the kinds of learning abilities required to master the complexities of language. Three broad issues characterize my work. One line of research asks what kinds of learning emerge in infancy. A second line of research probes the biases that shape human learning abilities, and the relationship between these biases and the structure of human languages. A third issue concerns the extent to which the learning abilities underlying this process are specifically tailored for language acquisition. Related research concerns infant music perception, and the relationship between music and language learning.
![Page 34: Prelinguistic development. Developmental periods 1;0 preverbal stage 1;0 – 1;6 one word stage 1;7 – 2;0 two-word stage 2;0 – 3;0 multiple word utterances.](https://reader030.fdocuments.in/reader030/viewer/2022032518/56649cca5503460f94992e29/html5/thumbnails/34.jpg)
Function words
How do children acquire their native language? My research focuses on the kinds of learning abilities required to master the complexities of language. Three broad issues characterize my work. One line of research asks what kinds of learning emerge in infancy. A second line of research probes the biases that shape human learning abilities, and the relationship between these biases and the structure of human languages. A third issue concerns the extent to which the learning abilities underlying this process are specifically tailored for language acquisition. Related research concerns infant music perception, and the relationship between music and language learning.
![Page 35: Prelinguistic development. Developmental periods 1;0 preverbal stage 1;0 – 1;6 one word stage 1;7 – 2;0 two-word stage 2;0 – 3;0 multiple word utterances.](https://reader030.fdocuments.in/reader030/viewer/2022032518/56649cca5503460f94992e29/html5/thumbnails/35.jpg)
Function words
How do children acquire their native language? My research focuses on the kinds of learning abilities required to master the complexities of language. Three broad issues characterize my work. One line of research asks what kinds of learning emerge in infancy. A second line of research probes the biases that shape human learning abilities, and the relationship between these biases and the structure of human languages. A third issue concerns the extent to which the learning abilities underlying this process are specifically tailored for language acquisition. Related research concerns infant music perception, and the relationship between music and language learning.
![Page 36: Prelinguistic development. Developmental periods 1;0 preverbal stage 1;0 – 1;6 one word stage 1;7 – 2;0 two-word stage 2;0 – 3;0 multiple word utterances.](https://reader030.fdocuments.in/reader030/viewer/2022032518/56649cca5503460f94992e29/html5/thumbnails/36.jpg)
Function words
How do children acquire their native language? My research focuses on the kinds of learning abilities required to master the complexities of language. Three broad issues characterize my work. One line of research asks what kinds of learning emerge in infancy. A second line of research probes the biases that shape human learning abilities, and the relationship between these biases and the structure of human languages. A third issue concerns the extent to which the learning abilities underlying this process are specifically tailored for language acquisition. Related research concerns infant music perception, and the relationship between music and language learning.
![Page 37: Prelinguistic development. Developmental periods 1;0 preverbal stage 1;0 – 1;6 one word stage 1;7 – 2;0 two-word stage 2;0 – 3;0 multiple word utterances.](https://reader030.fdocuments.in/reader030/viewer/2022032518/56649cca5503460f94992e29/html5/thumbnails/37.jpg)
Early speech production
Infant vocal tract
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Early speech production
Human vocal tractPrimate vocal tract
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Early speech production
> 0;2 reflexive vocalization
0;2 – 0;6 vocal play
0;6 – 0;10 babbling
(i) dadadada [reduplicated babbling]
(ii) dabagidi [varigated babbling]
0;10 > jargon (conversational babbling)
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Canonical word forms
[majos] or [mEjan] monster
[tajak] or [tajaÎ] tiger
[CVjCV]
[®a®a]
Randall
[®e:®e:] window
[®e:®e:] or [®i:®I]
finger
[®a®a]
another
[®V®V]
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Canonical word forms
[IS] fish
[dIS] dish
[uS] vest
[byS] brush
[IS] fetch
[(C)VS]
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Phonetic assimilation
• Context-free strategies• Context-bound strategies
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Phonetic assimilation
[d{s] glass
[bEd] bread
[sek] snake
[h{n] hand
[da] star
Reduction of
consonant cluster
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Phonetic assimilation
[b{n] van
[d{t] that
[nEr] there
[d{k] Jack
[d{b] jam
[dEk] check
Word-initial fricatives
are replaced by stops
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Phonetic assimilation
[bOt] pot
[do] toe
[dI] kiss
Voicing of word-
initial stops
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Phonetic assimilation
[dat] duck
[det] gate
[zus] shoes
[m{ts] match
[t{b@dz] cabbage
Fronting of
consonants
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Phonetic assimilation
[nOp] knob
[b{t] bad
[dOt] dog
[duf] stove
Devoicing of final
obstruents
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Phonetic assimilation
[böt] but
[gög] big
[gök] book
[gIg] pig
[gOg] dog
[dOt] dot
[gök] duck
[gIk] stick
Harmonization of
initial consonants (if
the word ends in a
velar consonant)
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Motherese
• Exaggerated stress patterns, exaggerated intonation
• Many repetitions
• Many vocatives/attention getters
• Many questions
• Simple sentences and simple grammatical constructions
• Basic vocabulary
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Fatherese
• Question-answer• Request-response• Focus of attention -
response