Limbic: Author-Based Sentiment Aspect Modeling Regularized with Word Embeddings and Discourse Relations

Zhe Zhang, Munindar Singh


Abstract
We propose Limbic, an unsupervised probabilistic model that addresses the problem of discovering aspects and sentiments and associating them with authors of opinionated texts. Limbic combines three ideas, incorporating authors, discourse relations, and word embeddings. For discourse relations, Limbic adopts a generative process regularized by a Markov Random Field. To promote words with high semantic similarity into the same topic, Limbic captures semantic regularities from word embeddings via a generalized Pólya Urn process. We demonstrate that Limbic (1) discovers aspects associated with sentiments with high lexical diversity; (2) outperforms state-of-the-art models by a substantial margin in topic cohesion and sentiment classification.
Anthology ID:
D18-1378
Volume:
Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing
Month:
October-November
Year:
2018
Address:
Brussels, Belgium
Editors:
Ellen Riloff, David Chiang, Julia Hockenmaier, Jun’ichi Tsujii
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
3412–3422
Language:
URL:
https://aclanthology.org/D18-1378
DOI:
10.18653/v1/D18-1378
Bibkey:
Cite (ACL):
Zhe Zhang and Munindar Singh. 2018. Limbic: Author-Based Sentiment Aspect Modeling Regularized with Word Embeddings and Discourse Relations. In Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing, pages 3412–3422, Brussels, Belgium. Association for Computational Linguistics.
Cite (Informal):
Limbic: Author-Based Sentiment Aspect Modeling Regularized with Word Embeddings and Discourse Relations (Zhang & Singh, EMNLP 2018)
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PDF:
https://aclanthology.org/D18-1378.pdf