0215_sent_proc_1

0215_sent_proc_1 - Psycholinguistics Syntax Sentence...

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Psycholinguistics: 9.59; 24.905 February 15, 2005 Ted Gibson
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Practice sentences 1. Fred borrowed some money from Maria on Tuesday. 2. The apple which Mary found on the ground contained a worm. 3. The book was given to Mary by the teacher. 4. The woman who the book was given to was happy. 5. English-Japanese: Mary told John that Bill found some money at the game.
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Today’s lecture 1. Syntax: Representational issues: 1. Finite state transition networks? 2. Trees? 3. Empty categories?
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Syntax: Representational Issues Can syntax be modeled using Finite state transition networks (FSTNs) rather than context-free grammars (CFGs)? That is, can we model syntax with one big complex rule, rather than a set of smaller rules? Finite state transition network (FSTN): a set of states; a set of allowable transitions from one state to another; a subset of start states; a subset of final states.
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Finite state transition networks (FSTNs) Goal: a network of states that accepts the following set of intransitive verb sentences: The dog ran. The boy slept. The big tall girl walked. The large green ugly snake moved.
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Finite state transition networks (FSTNs) Det Adj N V-intrans Det the N dog, boy, girl, snake Adj big, large, tall, ugly, green V-intrans walked, ran, slept, moved
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Finite state transition networks (FSTNs) Now add states so that transitive sentences can be recognized: The dog saw the girl. The boy bought the dog. The big tall girl found the large green ugly snake.
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Finite state transition networks (FSTNs) Det Adj N V-intrans V-trans Det Adj N V-trans bought, saw, found
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Finite state transition networks (FSTNs) Now add states so that S-complement sentences can be recognized: The girl thought that the boy bought the dog. The large boy said that the big tall girl found the large green ugly snake.
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Finite state transition networks (FSTNs) Det Adj N V-intrans V-trans Det Adj N V-comp that V-comp said, thought
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Finite state transition networks (FSTNs) Problem for FSTNs: duplication of sub-networks. E.g., there needs to be a separate sub-network for NPs for each position that an NP can occur: In subject position: a verb must follow In object position: no verb can follow In first object position of a double-object verb: a second NP must follow Each of these positions must include all the structure of an NP: i.e., adjectives, prepositional phrase modifiers, relative clause modifiers etc.
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Finite state transition networks (FSTNs) Det Adj N V-intrans V-trans Det Adj N V-ditrans Det Adj N V-ditrans gave, sent
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0215_sent_proc_1 - Psycholinguistics Syntax Sentence...

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