SpanEmo: Casting Multi-label Emotion Classification as Span-prediction

Hassan Alhuzali, Sophia Ananiadou


Abstract
Emotion recognition (ER) is an important task in Natural Language Processing (NLP), due to its high impact in real-world applications from health and well-being to author profiling, consumer analysis and security. Current approaches to ER, mainly classify emotions independently without considering that emotions can co-exist. Such approaches overlook potential ambiguities, in which multiple emotions overlap. We propose a new model “SpanEmo” casting multi-label emotion classification as span-prediction, which can aid ER models to learn associations between labels and words in a sentence. Furthermore, we introduce a loss function focused on modelling multiple co-existing emotions in the input sentence. Experiments performed on the SemEval2018 multi-label emotion data over three language sets (i.e., English, Arabic and Spanish) demonstrate our method’s effectiveness. Finally, we present different analyses that illustrate the benefits of our method in terms of improving the model performance and learning meaningful associations between emotion classes and words in the sentence.
Anthology ID:
2021.eacl-main.135
Volume:
Proceedings of the 16th Conference of the European Chapter of the Association for Computational Linguistics: Main Volume
Month:
April
Year:
2021
Address:
Online
Editors:
Paola Merlo, Jorg Tiedemann, Reut Tsarfaty
Venue:
EACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
1573–1584
Language:
URL:
https://aclanthology.org/2021.eacl-main.135
DOI:
10.18653/v1/2021.eacl-main.135
Bibkey:
Cite (ACL):
Hassan Alhuzali and Sophia Ananiadou. 2021. SpanEmo: Casting Multi-label Emotion Classification as Span-prediction. In Proceedings of the 16th Conference of the European Chapter of the Association for Computational Linguistics: Main Volume, pages 1573–1584, Online. Association for Computational Linguistics.
Cite (Informal):
SpanEmo: Casting Multi-label Emotion Classification as Span-prediction (Alhuzali & Ananiadou, EACL 2021)
Copy Citation:
PDF:
https://aclanthology.org/2021.eacl-main.135.pdf
Code
 hasanhuz/SpanEmo