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Evaluator Bias Spreads Like a Contagion in Multi-Agent LLM Systems, New Research Finds Technology
Artificial Intelligence #contagion networks#evaluator bias

Evaluator Bias Spreads Like a Contagion in Multi-Agent LLM Systems, New Research Finds

A new paper from arXiv introduces 'Contagion Networks,' a formal framework to measure how evaluation biases propagate when large language models serve as evaluators in multi-agent systems. In a controlled experiment using DeepSeek-chat, researchers found consistent bias propagation between agents, and demonstrated that increasing the evaluator committee from one to three agents reduces effective contagion by 72.4%.

Jun 20, 2026 1 source