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Authors: Martin Emms and Alfredo Maldonado-Guerra

Affiliation: Trinity College, Ireland

Keyword(s): LSA, Dimensionality.

Related Ontology Subjects/Areas/Topics: Artificial Intelligence ; Artificial Intelligence and Decision Support Systems ; Case-Based Reasoning ; Classification ; Clustering ; Enterprise Information Systems ; Feature Selection and Extraction ; Matrix Factorization ; Pattern Recognition ; Similarity and Distance Learning ; Symbolic Systems ; Theory and Methods

Abstract: Latent Semantic Analyis (LSA) consists in the use of SVD-based dimensionality-reduction to reduce the high dimensionality of vector representations of documents, where the dimensions of the vectors correspond simply to word counts in the documents. We show that that there are two contending, inequivalent, formulations of LSA. The distinction between the two is not generally noted and while some work adheres to one formulation, other work adheres to the other formulation. We show that on both a tiny contrived data-set and also on a more substantial word-sense discovery data-set that the empirical outcomes achieved with LSA vary according to which formulation is chosen.

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Paper citation in several formats:
Emms, M. and Maldonado-Guerra, A. (2013). Latent Ambiguity in Latent Semantic Analysis?. In Proceedings of the 2nd International Conference on Pattern Recognition Applications and Methods - ICPRAM; ISBN 978-989-8565-41-9; ISSN 2184-4313, SciTePress, pages 115-120. DOI: 10.5220/0004178301150120

@conference{icpram13,
author={Martin Emms. and Alfredo Maldonado{-}Guerra.},
title={Latent Ambiguity in Latent Semantic Analysis?},
booktitle={Proceedings of the 2nd International Conference on Pattern Recognition Applications and Methods - ICPRAM},
year={2013},
pages={115-120},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004178301150120},
isbn={978-989-8565-41-9},
issn={2184-4313},
}

TY - CONF

JO - Proceedings of the 2nd International Conference on Pattern Recognition Applications and Methods - ICPRAM
TI - Latent Ambiguity in Latent Semantic Analysis?
SN - 978-989-8565-41-9
IS - 2184-4313
AU - Emms, M.
AU - Maldonado-Guerra, A.
PY - 2013
SP - 115
EP - 120
DO - 10.5220/0004178301150120
PB - SciTePress

- Science and Technology Publications, Lda.
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