首页|Evaluating semantic similarity and relatedness over the semantic grouping of clinical term pairs
Evaluating semantic similarity and relatedness over the semantic grouping of clinical term pairs
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NSTL
Elsevier
Introduction: This article explores how measures of semantic similarity and relatedness are impacted by the semantic groups to which the concepts they are measuring belong. Our goal is to determine if there are distinctions between homogeneous comparisons (where both concepts belong to the same group) and heterogeneous ones (where the concepts are in different groups). Our hypothesis is that the similarity measures will be significantly affected since they rely on hierarchical is-a relations, whereas relatedness measures should be less impacted since they utilize a wider range of relations. In addition, we also evaluate the effect of combining different measures of similarity and relatedness. Our hypothesis is that these combined measures will more closely correlate with human judgment, since they better reflect the rich variety of information humans use when assessing similarity and relatedness. Method: We evaluate our method on four reference standards. Three of the reference standards were annotated by human judges for relatedness and one was annotated for similarity. Results: We found significant differences in the correlation of semantic similarity and relatedness measures with human judgment, depending on which semantic groups were involved. We also found that combining a definition based relatedness measure with an information content similarity measure resulted in significant improvements in correlation over individual measures. (C) 2014 Elsevier Inc. All rights reserved.
Natural language processingNLPSemantic similaritySemantic relatedness
McInnes, Bridget T.、Pedersen, Ted
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Virginia Commonwealth Univ, Dept Comp Sci, Richmond, VA 23284 USA
Univ Minnesota, Dept Comp Sci, Duluth, MN 55812 USA
NSTL
Elsevier
