EmoGRACE: aspect-based emotion analysis for social media data
摘要
While numerous research efforts have focused on sentiment analysis—including an advancement from sentence to aspect-level—the complex challenge of Aspect-based Emotion Analysis (ABEA) has not been widely investigated. ABEA is a highly challenging task due to the enormous complexity of emotion classification in contrast to binary sentiments. Furthermore, rigorously labeled datasets are scarce. This paper addresses these gaps by generating a novel ABEA training dataset, consisting of 2621 English Tweets, and fine-tuning a BERT-based model for the ABEA subtasks of Aspect Term Extraction (ATE) and Aspect Emotion Classification (AEC). The dataset annotation process made use of group annotation and majority voting strategies to facilitate label consistency. The resulting dataset contained aspect-level emotion labels for Anger, Sadness, Happiness, Fear, and a None class. Using the new ABEA training dataset, we developed EmoGRACE as a fine-tuned version of the ABSA model GRACE by Luo et al. (in: Findings of the association for computational linguistics: EMNLP 2020, pp 54–64. Association for Computational Linguistics, 2020) for ABEA. The results reflected a performance plateau at an F1-score of 70.1% for ATE and 46.9% for joint ATE and AEC extraction. Although model performance was limited by the small training dataset size and the increased task complexity, leading to overfitting and reduced generalization, the study establishes a first necessary benchmark for ABEA in social media research.