DISCo at ACL-HLT 2011 - Exemplar-Based Word-Space Model for Compositionality Detection: Shared Task System Description

Exemplar-Based Word-Space Model for Compositionality Detection: Shared Task System Description

Siva Reddy, Diana McCarthy, Suresh Manandhar and Spandana Gella

DiSCO 2011 : Workshop on Distributional Semantics and Compositionality (DiSCo at ACL-HLT 2011)
Portland, Oregon, June 24, 2011

Summary

In this paper, we highlight the problems of polysemy in word space models of compositionality detection. Most models represent each word as a single prototype-based vector without addressing polysemy. We propose an exemplar-based model which is designed to handle polysemy. This model is tested for compositionality detection and it is found to outperform existing prototype-based models. We have participated in the shared task of DisCo'2011 and our best performing exemplar-model is ranked first in two types of evaluations and second in two other evaluations.

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