Expectation vectors: a semiotics inspired approach to geometric lexical-semantic representation

  • Authors:
  • Justin Washtell

  • Affiliations:
  • University of Leeds, Leeds, UK

  • Venue:
  • GEMS '10 Proceedings of the 2010 Workshop on GEometrical Models of Natural Language Semantics
  • Year:
  • 2010

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Abstract

We introduce a new family of geometric models of meaning, inspired by principles from semiotics and information theory, based on what we call Expectation Vectors. We present theoretical arguments in support of these representations over traditional context-feature vectors: primarily that they provide a more intuitive representation of meaning, and detach vector representation from the specific context features thereby allowing arbitrarily sophisticated language models to be leveraged. We present a preliminary evaluation of an expectation vector based word sense disambiguation system using the SemEval-2007 task 2 dataset, with very encouraging results, particularly with respect to ambiguous verbs.