Dynamic Causal Disentanglement Model for Dialogue Emotion Detection
Yuting Su, Yichen Wei, Weizhi Nie, Sicheng Zhao, An-An Liu
Abstract
Emotion detection is a critical technology extensively employed in diverse fields. While the incorporation of commonsense knowledge has proven beneficial for existing emotion detection methods, dialogue-based emotion detection encounters numerous difficulties and challenges due to human agency and the variability of dialogue content. In dialogues, human emotions tend to accumulate in bursts. However, they are often implicitly expressed. This implies that many genuine emotions remain concealed within a plethora of unrelated words and dialogues. In this paper, we propose a Dynamic Causal Disentanglement Model founded on the separation of hidden variables, which effectively decomposes the content of dialogues and investigates the temporal accumulation of emotions, thereby enabling more precise emotion recognition. First, we introduce a novel Causal Directed Acyclic Graph (DAG) to establish the correlation between hidden emotional information and other observed elements. Subsequently, our approach utilizes pre-extracted personal states and utterance topics as guiding factors for the distribution of hidden variables, aiming to separate irrelevant ones. Specifically, we propose a Dynamic Causal Disentanglement Model to infer the propagation of utterances and hidden variables, enabling the accumulation of emotion-related information throughout the conversation. To guide this disentanglement process, we leverage the GPT4.0 and LSTM networks to extract utterance topics and personal states as observed information. Finally, we test our approach on popular datasets in dialogue emotion detection and relevant experimental results verified the model's superiority.