Angeliki Linardatou at SemEval-2025 Task 11: Multi-label Emotion Detection

AbstractThis study, competing in SemEval 2025 Task 11 - Track A, detects anger, surprise, joy, fear, and sadness. We propose a hybrid approach combining fine-tuned BERT transformers, TF-IDF for lexical analysis, and a Voting Classifier (Logistic Regression, Random Forest, SVM, KNN, XG-Boost, LightGBM, CatBoost), with grid search optimizing thresholds. Our model achieves a macro F1-score of0.6864. Challenges include irony, ambiguity, and label imbalance. Future work will explore larger transformers, data augmentation, and cross-lingual adaptation. This research underscores the benefits of hybrid models, showing that combining deep learning with traditional NLP improves multi-label emotion detection.