Network Effects and Agreement Drift in LLM Debates
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866918448097918976 |
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| author | Cau, Erica Failla, Andrea Rossetti, Giulio |
| author_facet | Cau, Erica Failla, Andrea Rossetti, Giulio |
| contents | Large Language Models (LLMs) have demonstrated an unprecedented ability to simulate human-like social behaviors, making them useful tools for simulating complex social systems. However, it remains unclear to what extent these simulations can be trusted to accurately capture key social mechanisms, particularly in highly unbalanced contexts involving minority groups. This paper uses a network generation model with controlled homophily and class sizes to examine how LLM agents behave collectively in multi-round debates. Moreover, our findings highlight a particular directional susceptibility that we term \textit{agreement drift}, in which agents are more likely to shift toward specific positions on the opinion scale. Overall, our findings highlight the need to disentangle structural effects from model biases before treating LLM populations as behavioral proxies for human groups. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_11312 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Network Effects and Agreement Drift in LLM Debates Cau, Erica Failla, Andrea Rossetti, Giulio Social and Information Networks Artificial Intelligence Computers and Society Multiagent Systems Physics and Society Large Language Models (LLMs) have demonstrated an unprecedented ability to simulate human-like social behaviors, making them useful tools for simulating complex social systems. However, it remains unclear to what extent these simulations can be trusted to accurately capture key social mechanisms, particularly in highly unbalanced contexts involving minority groups. This paper uses a network generation model with controlled homophily and class sizes to examine how LLM agents behave collectively in multi-round debates. Moreover, our findings highlight a particular directional susceptibility that we term \textit{agreement drift}, in which agents are more likely to shift toward specific positions on the opinion scale. Overall, our findings highlight the need to disentangle structural effects from model biases before treating LLM populations as behavioral proxies for human groups. |
| title | Network Effects and Agreement Drift in LLM Debates |
| topic | Social and Information Networks Artificial Intelligence Computers and Society Multiagent Systems Physics and Society |
| url | https://arxiv.org/abs/2604.11312 |