Lexical Acquisition

At the end of the first year
A child learns to speak
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By 18 months, children can produce
About 50 words
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By 2 years the child's vocabulary is
About 200 words
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There is an explosion and by 5 years the child's vocabulary is
About 2000 words
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By 7 years the child has
About 4000 words
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18 month children know more words than they can produce, this is called
Comprehension before production
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At 18 months children understand
250 words
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Comprehension before production theorist
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First 50 words theorist
Katherine Nelson
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First 50 word can be classified as
Naming/people - 60%, Actions/events - 20%, Modifiers, Personal/social
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Majority of first 50 words are naming/people because
Adults assist with labelling using naming words (conrete nouns) when talking to their children
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Words ommited from early speech
Closed word classes
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Closed word classes
Determiners, primary auxillaries, pronouns, conjunctions
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Theorist for semantic aquisititon
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A word is given a narrower (under extended meaning)
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Word is given a broader (more general, overextended) meaning
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Ommison doesnt's effect syntactical structure
Children still understand S V O structure
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Grammatical function words
The closed word classes
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Adults can still understand what achuild is saying when grammatical function words are missing
Because the main words are still present
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Umbrella term (e.g. colour)
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Specific term (e.g. blue)
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Categories of semantic aquisition
Labelling, packaging, network building
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The first stage and involves making the link between the sounds of particular words and the objects to which they refer.
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Understanding a word’s range of meaning.
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Network building
Grasping the connections between words. Understanding some words are opposite in meaning
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Categorical overextension
Name for one member of a category is used for all members of the category
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Analogical overextension
A word for one object is extended to one in a different category, based on common characteristics.
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'Ball' used for 'orange
Anological overextension
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'Apple' used for all fruit
Categorical overextension
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Mismatch overextension
No clear association, a loose connection made based on past experience
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Understanding that ‘mummy’ refers to the child’s mother).
An example of labelling
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Other cards in this set

Card 2


By 18 months, children can produce


About 50 words

Card 3


By 2 years the child's vocabulary is


Preview of the front of card 3

Card 4


There is an explosion and by 5 years the child's vocabulary is


Preview of the front of card 4

Card 5


By 7 years the child has


Preview of the front of card 5
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