Henna Paakki


2025

This paper presents an approach to computationally detecting face-threatening and paired actions in asynchronous online conversations. Action detection has been widely studied for synchronous chats. However, there are fewer models or datasets for asynchronous conversations, and they have not included some of the face-threatening actions central to online conversations involving misbehavior like trolling. We examine asynchronous crisis news related online conversations in Finnish, providing an annotation scheme for identifying central actions used in this conversational context. An important contribution is to include face-threatening actions in the scheme, and training computational classifiers for their detection with improved performance compared to prior work. We illustrate that face-threatening actions are important for analyzing conversations related to crisis news. We show that for computational action detection, it is essential to be able to represent how multiple actions may be performed within one comment, and how ambiguity in the expression of actions often leads to multiple possible label interpretations. Annotating actions using scores helps to reflect these characteristics. We also find that an ensemble of models trained on individual annotators’ annotations can best represent multiple potential interpretations of action labels. These are especially relevant for face-threatening actions.

2024

This paper describes the system submitted by our team to the Multilingual Euphemism Detection Shared Task for the Fourth Workshop on Figurative Language Processing (FigLang 2024). We propose a novel model for multilingual euphemism detection, combining contextual and behavior-related features. The system classifies texts that potentially contain euphemistic terms with an ensemble classifier based on outputs from behavior-related fine-tuned models. Our results show that, for this kind of task, our model outperforms baselines and state-of-the-art euphemism detection methods. As for the leader-board, our classification model achieved a macro averaged F1 score of [anonymized], reaching the [anonymized] place.