[Submitted on 22 Sep 2026]
Title:Same evidence, different judgments: Evidence noncommutative in vision/speech-text conflicts
View a PDF of the paper titled Same evidence, different judgments: Evidence noncommutative in vision/speech-text conflicts, by Zhuoyun Li and 3 other authors
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Abstract:For multimodal large language models, when images or speech conflict with accompanying text, measured text reliance can entangle modality preference with evidence position. Earlier studies of text bias often used a fixed evidence order or moved task instructions with the evidence, leaving the contribution of order unclear. In this paper, we use a paired comparison that keeps the instructions and evidence content fixed and swaps only the positions of the two sources to quantify this potential influence. Across vision and speech models, placing an image or recording after conflicting text consistently shifts answers toward its content. We also revisit previous studies and analyze why their experimental settings can lead to misleading conclusions. These findings reveal cross-modal evidence noncommutativity: the same evidence can lead to different judgments when its order changes, and placing perceptual evidence later can increase the model's reliance on its content.
Subjects:
Artificial Intelligence (cs.AI)
Cite as: arXiv:2609.26986 [cs.AI]
(or arXiv:2609.26986v1 [cs.AI] for this version)
https://doi.org/10.48550/arXiv.2609.26986
arXiv-issued DOI via DataCite (pending registration)
Submission history
From: Zhuoyun Li [view email] [v1] Tue, 22 Sep 2026 19:25:15 UTC (2,269 KB)
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View a PDF of the paper titled Same evidence, different judgments: Evidence noncommutative in vision/speech-text conflicts, by Zhuoyun Li and 3 other authors
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