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Automatic inference of affective charge in social media posts

Grant number: 21/07067-0
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): September 01, 2021
Effective date (End): December 31, 2022
Field of knowledge:Physical Sciences and Mathematics - Computer Science
Principal Investigator:Helena de Medeiros Caseli
Grantee:Fernanda Malheiros Assi
Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated scholarship(s):22/02472-6 - Development of an affective load inference module for tweets in politics, BE.EP.IC


Social media are increasingly becoming spaces where people share their opinions, emotion, and perceptions about various subjects including politics, culture, and personal issues. In this context, many studies and researches on natural language processing (NLP) have been focusing on text processing in social media in order to, among other reasons, foresee political ideologies, personality disorders, and mental health. However, in order to find such traits, the majority of these researches focus on detecting polarity (valence) or emotions between documents or between users of the social media, instead of analyzing texts across time. Thus, this project aims to create a computational model capable of measuring the emotional charge over time, in social media posts, linked to a specific topic or event through a time series of emotional domains. The valence and the average excitation estimated from posts published within the same small window of time will represent an observation of such a time series, which describes a variation of the emotional charge in the "Scherer's space". In order to predict the emotional charge, it is intended to use the LSTM model and GRU cells as base models, due to the fact that in recent years they have proven to be promising models with their capability to model long-term dependencies. (AU)

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