ESIHGNN: Event-State Interactions Infused Heterogeneous Graph Neural Network for Conversational Emotion Recognition

• URL: http://arxiv.org/abs/2405.03960v1
• Date: Tue, 7 May 2024 02:46:11 GMT
• Title: ESIHGNN: Event-State Interactions Infused Heterogeneous Graph Neural Network for Conversational Emotion Recognition
• Authors: Xupeng Zha, Huan Zhao, Zixing Zhang,
• Abstract summary: Existing graph-based methods mainly focus on event interactions to comprehend the conversational context. We propose a novel graph-based approach, namely Event-State Interactions infused Heterogeneous Graph Neural Network (ESIHGNN) ESIHGNN incorporates the speaker's emotional state and constructs a heterogeneous event-state interaction graph to model the conversation.
• Score: 16.800240197327923
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Conversational Emotion Recognition (CER) aims to predict the emotion expressed by an utterance (referred to as an ``event'') during a conversation. Existing graph-based methods mainly focus on event interactions to comprehend the conversational context, while overlooking the direct influence of the speaker's emotional state on the events. In addition, real-time modeling of the conversation is crucial for real-world applications but is rarely considered. Toward this end, we propose a novel graph-based approach, namely Event-State Interactions infused Heterogeneous Graph Neural Network (ESIHGNN), which incorporates the speaker's emotional state and constructs a heterogeneous event-state interaction graph to model the conversation. Specifically, a heterogeneous directed acyclic graph neural network is employed to dynamically update and enhance the representations of events and emotional states at each turn, thereby improving conversational coherence and consistency. Furthermore, to further improve the performance of CER, we enrich the graph's edges with external knowledge. Experimental results on four publicly available CER datasets show the superiority of our approach and the effectiveness of the introduced heterogeneous event-state interaction graph.

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