Format as a Prior: Quantifying and Analyzing Bias in LLMs for Heterogeneous Data

arXiv — cs.LGWednesday, January 14, 2026 at 5:00:00 AM
  • A comprehensive study has been conducted on format bias in Large Language Models (LLMs), revealing systematic biases towards certain data formats that may hinder their ability to process heterogeneous data impartially. The research involved a three-stage empirical analysis, assessing the presence and direction of bias across various LLMs, the influence of data-level factors, and the internal mechanisms of bias emergence.
  • Understanding these biases is crucial as they can lead to reasoning errors and increased risks in applications relying on LLMs for diverse data integration, impacting their reliability in real-world scenarios.
  • This research aligns with ongoing discussions about the limitations of LLMs, including their performance in specific tasks, the need for better adaptation frameworks, and the importance of addressing biases in AI systems, which are critical for ensuring equitable and effective AI applications.
— via World Pulse Now AI Editorial System

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