Benchmarks and models for entity-oriented polarity detection

Peer reviewe

Emotion helps Sentiment: A Multi-task Model for Sentiment and Emotion Analysis

In this paper, we propose a two-layered multi-task attention based neural network that performs sentiment analysis through emotion analysis. The proposed approach is based on Bidirectional Long Short-Term Memory and uses Distributional Thesaurus as a source of external knowledge to improve the sentiment and emotion prediction. The proposed system has two levels of attention to hierarchically build a meaningful representation. We evaluate our system on the benchmark dataset of SemEval 2016 Task 6 and also compare it with the state-of-the-art systems on Stance Sentiment Emotion Corpus. Experimental results show that the proposed system improves the performance of sentiment analysis by 3.2 F-score points on SemEval 2016 Task 6 dataset. Our network also boosts the performance of emotion analysis by 5 F-score points on Stance Sentiment Emotion Corpus.Comment: Accepted in the Proceedings of The 2019 IEEE International Joint Conference on Neural Networks (IJCNN 2019

FSAL: Lexicón financiero de sentimiento en español rioplatense diseñado para “Bolsas y Mercados Argentinos” (BYMA)

During the last decade studies have shown that lexicon-based Sentiment Analysis of tweets combined with Machine Learning techniques can be used to enhance Algorithmic Trading strategies. The aim of the present work is to show how a specific domain lexicon in finance for the Argentinian Markets (FSAL) provides a better outcome than a generic lexicon (SDAL). First, we introduce a finance tailor-made lexicon. Secondly, we experimentally show that our lexicon outperforms a general purpose one on a corpus of tweets previously classified collaboratively by specialists in finance. Then, we compare the lexicons applying three different Machine Learning algorithms. Finally, we introduce some preliminary results and conclusions.En la última década, se ha estudiado cómo el Análisis de Sentimiento basado en lexicones en combinación con técnicas de Machine Learning puede ser utilizado para optimizar estrategias de Trading Algorítmico. El presente trabajo tiene como objetivo mostrar que un lexicón de dominio específico en finanzas (FSAL) diseñado para Bolsas y Mercados Argentinos obtiene mejores resultados que un lexicón de propósitos generales (SDAL). Primero, proponemos un lexicón a medida en finanzas. Segundo, mostramos que nuestro lexicón supera los resultados obtenidos en comparación a los resultados de un lexicón de propósitos generales aplicado sobre un corpus compuesto por tweets de cuentas de comunidades de confianza de los mercados argentinos, previamente clasificado de manera colaborativa por expertos en finanzas. Luego, realizamos un estudio comparado de los lexicones aplicando diferentes técnicas de Machine Learning. Finalmente, presentamos algunos resultados preliminares y conclusiones