Using fMRI activation to conceptual stimuli to evaluate methods for extracting conceptual representations from corpora

  • Authors:
  • Barry Devereux;Colin Kelly;Anna Korhonen

  • Affiliations:
  • University of Cambridge;University of Cambridge;University of Cambridge

  • Venue:
  • CN '10 Proceedings of the NAACL HLT 2010 First Workshop on Computational Neurolinguistics
  • Year:
  • 2010

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Abstract

We present a series of methods for deriving conceptual representations from corpora and investigate the usefulness of the fMRI data and machine learning methodology of Mitchell et al. (2008) as a basis for evaluating the different models. Within this framework, the quality of a semantic model is quantified by its ability to predict the fMRI activation associated with conceptual stimuli. Mitchell et al. used a manually-acquired set of verbs as the basis for their semantic model; in this paper, we also consider automatically acquired feature-norm-like semantic representations. These models make different assumptions about the kinds of information available in corpora that is relevant to representing conceptual knowledge. Our results indicate that automatically-acquired representations can make equally powerful predictions about the brain activity associated with the stimuli.