PSY 369: Psycholinguistics - the Department of Psychology at
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Transcript PSY 369: Psycholinguistics - the Department of Psychology at
PSY 369: Psycholinguistics
Language Acquisition II
Language Sponges
How do they do it (and what are they doing)?
Learning words
12 ms
2 yrs
3 yrs
6 yrs
first words
200 words
1,000 words
15,000 words
About 3,000 new words per year, especially in the primary
grades
As many as 8 new words per day
Language Sponges
Learning words
General patterns and observations
Sounds
Meaning
Proposed Strategies
Fast mapping
Whole object
Mutual exclusivity
Learning Syntax
Learning Morphology
Early word learning
First words (Around 10-15 months)
Emergence of systematic, repeated productions of
phonologically consistent forms
1 word stage typically lasts around 10 months
Have learned first 50 words by 15 – 24 months
Typically focused on the “here and now”
Early word learning
First words (Around 10-15 months)
Emergence of systematic, repeated productions of
phonologically consistent forms
Idiomorphs - personalized words
Developed in systematic ways
Not simply imitation, rather are creative
Learned importance of consistency of names
“Adult words” - Typically context bound (relevant to the
immediate environment)
Important people, Objects that move, Objects that can be
acted upon, Familiar actions
Nouns typically appear before verbs
What kinds of words?
1-general names
2- specific names
“red”
5-personal/social
“bye-bye”
4-modifiers
“mommy”
3-action words
“dog”
“yes, no, please”
6-functional
“what”
Early speech production
Transition to speech
This Your
is your
fis?
fis?
Oh, your fish.
No.No.
…My
my fis!
fis.
Yes, my fis.
Early speech production
Transition to speech
Can’t hear the difference?
Your fis.
Oh, your fish.
Can’t produce the correct
sounds?
Rejects adult saying fis
This is your fis? No, … my fis.
Sometimes, but evidence
suggests not always the case
More general process of
simplification
“frees up” resources for
concentrating on other aspects of
language learning
No, my fis.
Yes, my fis.
Early speech production
Transition to speech
individual diffs, but some common processes
Common Phonological processes
Reduction
Delete sounds from words (“da” for dog)
Coalescence
Combine different syllables into one syllable (“paf”
for pacifier)
Assimilation
Change one sound into a similar sound within the
word (“fweet” for sweet)
Reduplication
One syllable from a multi-syllabic word is repeated
(“baba” for bottle)
Extensions of meaning
Applying the words to referents
Extension
Finding the appropriate limits of the meaning of
words
Underextension
Applying a word too narrowly
Overextension
Applying a word too broadly
Extensions of meaning
“tee”
Extensions of meaning
“tee”
1:9,11
Extensions of meaning
“tee”
1:9,11
1:10,18
Extensions of meaning
“tee”
1:9,11
1:10,18
1:11,1
“googie”
Extensions of meaning
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
Extensions of meaning
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
1:11,24
“googie”
Extensions of meaning
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
1:11,24
1:11,25
“tee/hosh”
Extensions of meaning
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
1:11,24
1:11,25
1:11,26
“tee/hosh”
“hosh”
Extensions of meaning
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
1:11,24
1:11,25
1:11,26
1:11,27
“tee/hosh”
“hosh”
“pushi”
Extensions of meaning
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
1:11,24
1:11,25
1:11,26
1:11,27
2:0,10
“tee/hosh”
“hosh”
“moo-ka”
“pushi”
“hosh”
Extensions of meaning
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
1:11,24
1:11,25
1:11,26
1:11,27
2:0,10
2:0,20
“tee/hosh”
“hosh”
“moo-ka”
“pushi”
“hosh”
“biggie googie”
One-word-per-referent heuristic
Extensions of meaning
If a new word comes in for a referent that is already named, replace it
Exception to that was “horse,” but it only lasted a day here
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
1:11,24
1:11,25
1:11,26
1:11,27
2:0,10
2:0,20
“tee/hosh”
“hosh”
“moo-ka”
“pushi”
“hosh”
“biggie googie”
Strategies for learning
Expansion and contraction can occur at the same time
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
1:11,24
1:11,25
1:11,26
1:11,27
2:0,10
2:0,20
“tee/hosh”
“hosh”
“moo-ka”
“pushi”
“hosh”
“biggie googie”
Strategies for learning
Child tries different things, if a word doesn’t work then
try something else
e.g., hosh didn’t for for the large dog, switched to
biggie doggie
“tee”
1:9,11
1:10,18
1:11,1
1:11,2
“googie”
1:11,24
1:11,25
1:11,26
1:11,27
2:0,10
2:0,20
“tee/hosh”
“hosh”
“moo-ka”
“pushi”
“hosh”
“biggie googie”
Indeterminacy: Frog
Frog
Frog?
Green?
Ugly?
Jumping?
Quine’s gavagai problem
The problem of reference:
a word may refer to a number of referents (real
world objects)
a single object or event has many objects, parts
and features that can be referred to
Frog
Frog?
Green?
Ugly?
Jumping?
Learning word meanings
Learning words
Fast mapping (Carey & Bartlett, 1978)
Using the context to guess the meaning of a word
Please give me the chromium tray. Not
the blue one, the chromium one.
All got the olive tray
Several weeks later still had some of the meaning
Constraints on Word Learning
Learning words
Cognitive Constraints (Markman, 1989)
Perhaps children are biased to entertain certain
hypotheses about word meanings over others
These first guesses save them from logical ambiguity
Get them started out on the right track
Object-scope (whole object) constraint
Taxonomic constraint
Mutual exclusivity constraint
Strategies for learning
Object-scope (whole object) constraint
Words refer to whole objects rather than to parts of
objects
Dog
Strategies for learning
Taxonomic constraint
Words refer to categories of similar objects
Taxonomies rather than thematically related obejcts
‘Here is a lux’
‘Show me another lux’
Strategies for learning
But in ‘no-word’ conditions, they would be
shown the first picture
See this? Can you find another one?
Strategies for learning
% Theme / Category
4 and 5 year olds' choice of theme vs. category
100
Theme
Category
70
40
10
-20
No word condition
Novel word condition
Strategies for learning
Mutual exclusivity constraint (Markam and Watchel 1988)
Each object has one label & different words refer to
separate, non-overlapping categories of objects
An object can have only one label
‘Show me a dax’:
they choose the corkscrew
because it is a less well known object for which they
don’t have a label yet.
Problem with constraints
Most of the constraints proposed apply only to object
names.
There have been cases where children have been
observed violating these constraints
What about verbs? (Nelson 1988)
Using for example the word ‘car’ only to refer to ‘cars moving
on the street from a certain location’ (Bloom 1973)
The mutual exclusivity constraint would prevent
children from learning subordinate and superordinate
information (animal < dog < poodle)
Language explosion continues
The language explosion is not just the result of simple
semantic development; the child is not just adding
more words to his/her vocabulary.
Child is mastering basic syntactic and morphological
rules.
Language explosion continues
Proto-syntax (?)
Holophrases
Single-word utterances used to express more than the meaning
usually attributed to that single word by adults
“dog”
might refer to the dog is drinking water
May reflect a developing sense of syntax, but not yet
knowing how to use it
Controversial claim (e.g., see Bloom, 1973)
Language explosion continues
Syntax
Basic child grammar (Slobin, 1985)
Similarities across all languages
Mean length of utterance (MLU) in morphemes
Take 100 utterances and count the number of morphemes
per utterance
Daddy coming. Hi, car. Daddy car comed. Two car outside. It
getting dark. Allgone outside. Bye-bye outside.
# morphemes: 3, 2, 4, 3, 4, 2, 2
‘-ing’ and ‘-ed’ separate morphemes
‘allgone’ treated as a single word
MLU = morphemes/utterances
= 20/7 = 2.86
Language explosion continues
6
5
MLU
4
3
2
1
0
0
10
20
30
age (months)
40
50
60
Language explosion continues
Syntax
Roger Brown proposed 5 stages
Stage 1: Telegraphic speech (MLU ~ 1.75; around 24 months)
One and two word utterances
Debate: learning semantic relations or syntactic (position rules)
Children in telegraphic speech stage are said to leave out the ‘little
words’ and inflections:
e.g. Mummy shoe NOT Mummy’s shoe
Two cat NOT two cats
Language explosion continues
Syntax
Roger Brown proposed 5 stages
More than two words
Stages 2 through 5
Stage 2 (MLU ~2.25) begin to modulate meaning using word
order (syntax)
Later stages reflect generally more complex use of syntax
(e.g., questions, negatives)
How do kids learn the syntax?
Innateness account
Pinker (1984, 1989)
Semantic bootstrapping
Child has innate
knowledge of
syntactic categories
Child learns the
and linking rules
meanings of
some content words Child constructs some
semantic representations
Child makes guesses
of simple sentences
about syntactic structure
based on surface form
and semantic meaning
How do kids learn the syntax?
“It is in the stimulus” accounts
Children do not need innate knowledge to learn grammar
Speech to children is not impoverished (Snow, 1977)
Children learn grammar by mapping semantic roles (agent, action,
patient) onto grammatical categories (subject, verb, object) (e.g.
Bates, 1979)