Prediction of Opinion Keywords and Their Sentiment Strength Score Using Latent Space Learning Methods



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García Cuesta, Esteban and Gómez Vergel, Daniel and Gracia Expósito, Luis and López López, Jose M. and Vela Pérez, María (2020) Prediction of Opinion Keywords and Their Sentiment Strength Score Using Latent Space Learning Methods. Applied Sciences, 10 (12). p. 4196. ISSN 2076-3417

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Most item-shopping websites give people the opportunity to express their thoughts and opinions on items available for purchasing. This information often includes both ratings and text reviews expressing somehow their tastes and can be used to predict their future opinions on items not yet reviewed. Whereas most recommendation systems have focused exclusively on ranking the items based on rating predictions or user-modeling approaches, we propose an adapted recommendation system based on the prediction of opinion keywords assigned to different item characteristics and their sentiment strength scores. This proposal makes use of natural language processing (NLP) tools for analyzing the text reviews and is based on the assumption that there exist common user tastes which can be represented by latent review topics models. This approach has two main advantages: is able to predict interpretable textual keywords and its associated sentiment (positive/negative) which will help to elaborate a more precise recommendation and justify it, and allows the use of different dictionary sizes to balance performance and user opinion interpretability. To prove the feasibility of the adapted recommendation system, we have tested the capabilities of our method to predict the sentiment strength score of item characteristics not previously reviewed. The experimental results have been performed with real datasets and the obtained F1 score ranges from 66% to 77% depending on the dataset used. Moreover, the results show that the method can generalize well and can be applied to combined domain independent datasets.

Item Type:Article
Uncontrolled Keywords:Opinion mining; text mining; recommendation systems; sentiment strength prediction; latent models
Subjects:Sciences > Statistics > Commercial research
Social sciences > Economics > Commerce
ID Code:67519
Deposited On:26 Aug 2021 08:30
Last Modified:26 Aug 2021 08:30

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