Stance detection aims to identify users’ attitudes toward specific targets in social media, playing a crucial role in information processing and public opinion management. However, existing research on stance detection often overlooks the potential influence of user personality traits on stance expression. In view of the shortcomings of existing stance detection methods, this paper studies the impact of personality traits on stance judgment. To this end, we propose PERStance, a personality-guided enhanced multimodal zero-shot stance detection method. Specifically, PERStance uses a Large Language Model (LLM) to infer users’ personality traits from a multi-dimensional perspective, thereby more accurately understanding users’ potential stances on specific targets. To mitigate issues such as LLM hallucinations and reasoning confusion, we incorporate the Chain-of-Thought framework in the stance detection stage and optimize its reasoning path. Experimental results on multiple multimodal stance detection datasets show that the PERStance method proposed in this paper achieves the best performance in stance detection, with an average increase of 23.88% in the Macro-F1 score. Ablation experiments verify the effectiveness of each module in this method. The source code of our proposed framework is released at https://github.com/jncsnlp/PERStance.
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