Linguistics 110 Linguistic Analysis: Sentences & Dialects
Lecture Number Twenty Six
Computational Syntax and Semantics


  1. Syntax (Augmented Transition Networks)

    How do human beings process sentences so rapidly?

    1. Finite State Devices

      The ¡ old ¡ man ¡ likes ¡ John
      art: the adj: old noun: man verb: likes noun: John
      DEF OLD MAN LIKES PN: ID

    2. Problems for Finite State Devices .

      1. Recursivity
        the old man who reads books that are popular likes John
        Solution: Separate N, V, A, det, aux, p processors
      2. Movement: It's John the old man likes? Does the old man like John?
        Solution: separate phrase types
      3. Ambiguity: The horse ran past the barn fell (garden-path sentences)
      4. Lexical encoding

        Taft & Zhu 1995

        1. polysemy: dope,
        2. synonymy: sofa : couch, bag : sack, bucket : pail
        3. homophony: pear, pare, pair
        4. polycategoriality: fire, hammer, rose, cooler

        Schreuder and Baayen 1995
        Figure 2. Access representations (layer A); concept nodes (layer B); semantic and syntactic nodes (layer C); and their connections for the Dutch noun boek 'book,' the adjective ruim 'spacious,' and related inflected and derived complex forms.


  2. Semantics (Spreading Activation Networks)

    1. Schemas / Scripts
      1. a set of expectations
        1. The waiter . . . .
        2. The fire hydrant . . . .
        3. The family cat . . . .

      2. Spreading Activation Network

        RESTAURANT script
        maitre d'hotel
        show to table
        give menu
        expect tip
        table
        chair
        legs
        back
        spine
        upright
        lean back
        table cloth
        flowers
        salt & pepper
        sugar
        waiter
        take order
        a la carte
        complete dinner
        luncheon menu
        breakfast menu
        ask about water
        bring order
        tip
        15%
        leave on table
        complain to

    2. Ambiguity (Why do we make the processing errors we do and not those we don't? )
      1. The firm drives . . . .
      2. The British left waffles [on the Falkland Islands]
      3. Garden path sentencesThe horse walked past the barn fell.

     

  3. Conclusions??

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