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arXiv · 2512.22603

Structured Prompting and LLM Ensembling for Multimodal Conversational Aspect-based Sentiment Analysis

Zhiqiang Gao·Shihao Gao·Zixing Zhang·Yihao Guo·Hongyu Chen·Jing Han
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Abstract

Understanding sentiment in multimodal conversations is a complex yet crucial challenge toward building emotionally intelligent AI systems. The Multimodal Conversational Aspect-based Sentiment Analysis (MCABSA) Challenge invited participants to tackle two demanding subtasks: (1) extracting a comprehensive sentiment sextuple, including holder, target, aspect, opinion, sentiment, and rationale from multi-speaker dialogues, and (2) detecting sentiment flipping, which detects dynamic sentiment shifts and their underlying triggers. For Subtask-I, in the present paper, we designed a structured prompting pipeline that guided large language models (LLMs) to sequentially extract sentiment components with refined contextual understanding. For Subtask-II, we further leveraged the complementary strengths of three LLMs through ensembling to robustly identify sentiment transitions and their triggers. Our system achieved a 47.38% average score on Subtask-I and a 74.12% exact match F1 on Subtask-II, showing the effectiveness of step-wise refinement and ensemble strategies in rich, multimodal sentiment analysis tasks.

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Zhiqiang Gao, Shihao Gao, Zixing Zhang, Yihao Guo, Hongyu Chen, Jing Han. 2025-12-27. Structured Prompting and LLM Ensembling for Multimodal Conversational Aspect-based Sentiment Analysis. https://doi.org/10.1145/3746027.3762070

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