3. WORD LEARNING Flashcards
types of word learning studies
- looking while listening/pointing (comprehension)
- recording how children talk in naturalistic settings, asking them to name things (production)
teaching children new words in lab
- what can they learn?
- how do they learn?
“point and name” learning
- usually only nouns
- point and name is not common and not universal
the mapping problem
- example of foreign word “gavagai”
- when something is labelled it could apply to multiple aspects
- under extension
- over extension
Quine, 1960
comprehension in infants
- appear to start to comprehend nouns as early as 6 months
- infants start to comprehend verbs later - 10 months
- 2 year olds comprehend 2-3x as many words as they produce
comprehension precedes production
looking while listening task
- 2 options, “look at hand” “… apple”
- between 18 and 24 months they get much faster (Fernald)
- by 18 months they don’t even need the full word
(Fernald, Swingley, & Pinto, 2001)
early noun bias
cross-linguistically, predominance of nouns in early vocabularies
e.g., 40% of English speaking childrens first 50 words - Nelson
more nouns even in “verb friendlier” languages
natural partitions hypothesis
early nouns denote concrete objects easily individuated from surroundings
actions, states etc. tend to apply to entities labelled by nouns, less clearly defined in space & time
Gentner, 1982
socially mediated word learning
- not all early words are nouns (hello)
- not all early nouns are discrete objects (breakfast)
- learning occurs in situations where easiest to read adult’s intentions, irrespective of word class
- happend often with nouns
Tomasello, 2003
Variety of early word production
Variety of situations
- names for people and objects
- names for actions
- names for properties
Tomasello, 1992
under-extension
word used only in specific context or specific exemplar
words used in specific contexts where adults would use in a wide range of contexts
- ‘bye’ only when putting the telephone receiver down
- ‘there’ only when putting an object in a location
- refer to the word flower to only mean a rose and not other flowers
Overextension
word used beyond its true meaning
overextension errors are frequent
- e.g., calling a ball an apple
- make erorrs until ~ 2.5 years
- category error
- vocabulary limitations
(Rescorla, 1980)
Object constraint - ‘innate’ constraint
- words refer to objects
- explains early noun bias
Gentner, 1982
whole-object - ‘innate’ constraint
- words refer to whole object rather than their parts
- “gavagai” = whole animal
Markman, 1991
principle of contrast - ‘innate’ constraint
- no words have exactly the same meaning
- explains how the child overcomes overextension
Clark, 1995
Mutual exclusivity - ‘innate constraint’
- no object has more than one name
- helps children override the ‘whole object constraint’ and learn the names for parts of objects
Markman, 1988