Word Classes And Devloping Lexicon Flashcards
What cues do babies use to segment the speech stream
-Prosodic cues(rhythm, stress pattern and intonation of speech)
-phonotactic cues (language specific syllable structure, consonant clusters and vowel sequences)
-words in isolation (around 10%)
-statistical cues (transitional probabilities refer to the likelihood of one syllable being followed by another
What two tasks does learning words involve
1)extract form from the sound wave (there are no consistent silences between words)
2)extract meaning from the situation (why acquiring the meaning of words is a problem)
What is the mapping problem
-even if somthing is explicitly labelled in the input. How does the child know what specifically the word refers to?
-an infinite number of hypothesis’s about word meaning are possible given the input the child has
What is the extension problem
-what to extend the problem to
-if a child hears her father say dog and learns that the word dog refers to her pet dog this isn’t enough as the word dog can refer to many types of dogs
-children do make many over and under extension errors in early word learning
Joint attention
-the ability to establish join attention and the ability to. Understand the speakers communicate intent
-from the age of about 10-12 months children actively attend to eye gaze and gestures to share joint attention reliably
-adults tend to talk to infants about entities and events that are physically present
What is fast mapping
-children begin by making an initial fast mapping between a new word they hear and its likely meaning
-they guess and then modify the guess as more input comes in
What is cues to and biases on word meaning
-children assume that words are used in certain ways
-these assumptions also called biases, facilitate learning word meaning by favouring certain kinds of hypothesis over others
-they are part of the learning mechanism and must fade as children grow
What is whole object bias
- a tendency to associate words with wholes
- when children hear a term for an object for which they have no name yet they assume the unfamiliar label picks out the whole object
- a novel label is likely to refer to the whole object and not to its parts, substance or other properties
Taxonomic assumption
-labels refer to objects of the same kind rather than to objects that are thematically related
-two objects are the thematically related if they are linked by some relation: casual, spatial, temporal or other (cow an milk)
-two objects are taxonomically related if they belong in the same catergory (cow and pig)
What is mutuL exclusivity assumption
-words are mutually exclusive, each objet will only have one and only one label
-at first whole object bias , if it already has a label then new label must be for somthing else
Or pressure by the mutual exclusivity bias- they assume that the novel word refers to the substance or a part of the object
-children will initially reject multiple labels for the same object if they already have a dog they will not accept the term animal or spaniel
What are the 3 criteria for determining the word class of word
The meaning of the word (semantic features)
Form or shape of a word
The position or environment of a word in a sentence
The meaning of a word (semantic features)
-it allows us to determine word classes by replacing words in a sentence with words of a similar meaning
-my son cools/prepares/eats dinner every Sunday
-however this approach does have limitations
-the definition of a noun as a word denoting a person, place, or thing excludes abstract nouns eg happiness
-similarity to say that verbs are action words excludes a verb like be as in i want to be happy
Form or shape of a word
-some words can be assigned to a word class on the basis of their form or shape
-tion ending communication
-ible eg visible
-many words also take on inflections= regular changes in their form under certain conditions
The position or environment of a word in a sentence
-this criteria refers to where words typically occur in a sentence and the kinds of words which typically occur in a sentence and the kinds of words which typically occur near to them
-i cook diner every Sunday or the cook is on holiday
How many words at 13 months
10 worda
How many words at 18 months
50 words
How many words at 24 months
310 words
At 50 words (18 months) what is the most common type. Of word
Nouns eg dog ball milk