做多模态AI行为控制或社交机器人开发的团队，这篇论文揭示了人格诱导对推理能力的意外损害，值得在模型部署前仔细评估。
该论文首次在视觉语言模型（MLLMs）中引入显式人格条件，建立了涵盖单人格诱导、多人格诱导和人格切换的系统评估框架。实验发现，人格诱导能提升图像描述性能，但会损害需要精确推理的任务（如视觉问答）。多人格组合和动态切换时存在平衡与残留效应，模型行为受前后人格约束共同调节。现有基于提示的人格诱导方法在多模态场景下迁移性有限。研究揭示了MLLMs人格建模的动态复杂性，呼吁开发更鲁棒、定制化的方法。
Modeling Complex Behaviors: Multi-Personality Composition and Dynamic Switching in Vision-Language Models
With the widespread deployment of Multimodal Large Language Models (MLLMs) in social interaction, understanding and controlling their behavior under complex personality conditions is essential. This paper introduces explicit personality conditioning and establishes a systematic evaluation framework encompassing single-personality induction, multi-personality induction, and personality switching. Experiments show that personality induction improves image captioning performance but can impair performance on tasks requiring precise reasoning, such as visual question answering (VQA). Balancing and residual effects are observed during multi-trait composition and dynamic switching, indicating that model behavior is co-modulated by both previous and current personality constraints. Existing prompt-based personality induction methods show limited transferability to multimodal settings. Our work reveals the dynamic and complex nature of personality modeling in MLLMs and underscores the need for robust, tailored methods for personality induction and evaluation. The code will be released when the paper is accepted.