[PDF][PDF] Learning word vectors for sentiment analysis

A Maas, RE Daly, PT Pham, D Huang… - Proceedings of the …, 2011 - aclanthology.org
A Maas, RE Daly, PT Pham, D Huang, AY Ng, C Potts
Proceedings of the 49th annual meeting of the association for …, 2011aclanthology.org
Unsupervised vector-based approaches to semantics can model rich lexical meanings, but
they largely fail to capture sentiment information that is central to many word meanings and
important for a wide range of NLP tasks. We present a model that uses a mix of
unsupervised and supervised techniques to learn word vectors capturing semantic term–
document information as well as rich sentiment content. The proposed model can leverage
both continuous and multi-dimensional sentiment information as well as non-sentiment …
Abstract
Unsupervised vector-based approaches to semantics can model rich lexical meanings, but they largely fail to capture sentiment information that is central to many word meanings and important for a wide range of NLP tasks. We present a model that uses a mix of unsupervised and supervised techniques to learn word vectors capturing semantic term–document information as well as rich sentiment content. The proposed model can leverage both continuous and multi-dimensional sentiment information as well as non-sentiment annotations. We instantiate the model to utilize the document-level sentiment polarity annotations present in many online documents (eg star ratings). We evaluate the model using small, widely used sentiment and subjectivity corpora and find it out-performs several previously introduced methods for sentiment classification. We also introduce a large dataset of movie reviews to serve as a more robust benchmark for work in this area.
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