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Paper at a Glance

Situated Grounded Word Semantics
Luc Steels
SONY CSL ­ Paris
VUB AI Laboratory ­ Brussels
steels@arti.vub.ac.be
Fr’ed’eric Kaplan
SONY CSL ­ Paris
LIP6 Universit’e Paris VI ­ Paris
kaplan@csl.sony.fr

Abstract The paper reports on experiments in which au­ tonomous visually grounded agents bootstrap an ontology and a shared lexicon without prior design nor other forms of human intervention. The agents do so while playing a particular lan­ guage game called the guessing game. We show that synonymy and polysemy arise as emergent properties in the language but also that there are tendencies to dampen it so as to make the language more coherent and thus more optimal from the viewpoints of communicative success, cognitive complexity, and learnability.
1 Introduction The goal of studying natural language semantics is to determine the systematic relations between language ut­ terances, their meanings and their referents. Speakers must conceptualise reality to find an adequate mean­ ing, and they verbalise this meaning to yield an utter­ ance transmitted to the hearer. The hearer must inter­ pret the utterance to reconstruct the meaning and ap­ ply the meaning in this particular context to retrieve back the referent. One possible framework for study­ ing these relationships is the theory of formal (denota­ tional) semantics and its application to the treatment of natural language [Montague 79]. In this framework, functions are defined for mapping natural language ut­ terances into expressions in the predicate calculus (with suitable extensions) and for mapping logical expressions into their denotations. Such a framework has been the basis of much work in computational semantics and has been used to formalise the communication systems of autonomous agents. Although this formal approach has many virtues, it makes a number of simplifying assumptions which are not valid for physically grounded evolving autonomous agents that are part of inhomogeneous populations op­ erating in ...

@inproceedings{steels99situatedGrounded,
  author={Luc Steels and F. Kaplan},
  title={Situated grounded word semantics},
  year={1999},
  editor={Dean, T.},
  publisher={Morgan Kaufmann Publishers},
  booktitle={IJCAI99},
  url={http://www.isrl.uiuc.edu/~amag/langev/paper/steels99situatedGrounded.html},
  keywords={semantics, grounding, evolutionary linguistics,Talking Heads}
}

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