On the Adaptive Psychological Persuasion of Large Language Models

• URL: http://arxiv.org/abs/2506.06800v1
• Date: Sat, 07 Jun 2025 13:52:50 GMT
• Title: On the Adaptive Psychological Persuasion of Large Language Models
• Authors: Tianjie Ju, Yujia Chen, Hao Fei, Mong-Li Lee, Wynne Hsu, Pengzhou Cheng, Zongru Wu, Zhuosheng Zhang, Gongshen Liu,
• Abstract summary: We show that Large Language Models (LLMs) can autonomously persuade and resist persuasion.<n>We introduce eleven comprehensive psychological persuasion strategies.<n>We propose an adaptive framework that trains LLMs to autonomously select optimal strategies.
• Score: 37.18479986426215
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Previous work has showcased the intriguing capabilities of Large Language Models (LLMs) in instruction-following and rhetorical fluency. However, systematic exploration of their dual capabilities to autonomously persuade and resist persuasion, particularly in contexts involving psychological rhetoric, remains unexplored. In this paper, we first evaluate four commonly adopted LLMs by tasking them to alternately act as persuaders and listeners in adversarial dialogues. Empirical results show that persuader LLMs predominantly employ repetitive strategies, leading to low success rates. Then we introduce eleven comprehensive psychological persuasion strategies, finding that explicitly instructing LLMs to adopt specific strategies such as Fluency Effect and Repetition Effect significantly improves persuasion success rates. However, no ``one-size-fits-all'' strategy proves universally effective, with performance heavily dependent on contextual counterfactuals. Motivated by these observations, we propose an adaptive framework based on direct preference optimization that trains LLMs to autonomously select optimal strategies by leveraging persuasion results from strategy-specific responses as preference pairs. Experiments on three open-source LLMs confirm that the proposed adaptive psychological persuasion method effectively enables persuader LLMs to select optimal strategies, significantly enhancing their success rates while maintaining general capabilities. Our code is available at https://github.com/KalinaEine/PsychologicalPersuasion.

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