Linguistic Context Recodes Visual Representations in Vision-Language Models

Brian Song, Michael A. Lepori, Ellie Pavlick


Abstract
Goal-directed visual processing is a hallmark of human visual intelligence, resulting in representations that support downstream tasks such as categorization or search. Though vision-language models (VLMs) are often faced with these same tasks, their ability to recode visual representations when presented with goal-directed language remains poorly characterized. Indeed, prior work largely treats visual representations in VLMs as static repositories of visual information that are manipulated by language representations. In the present work, we provide evidence for two concrete instances of language-induced recoding of visual representations. First, we identify an abstract reference representation that denotes which objects are goal-relevant under a natural language prompt. We extract contrastive steering vectors corresponding to this reference representation and demonstrate that they are causally implicated in model predictions. These reference representations are abstract in that they generalize to different objects, different task contexts, and even from synthetic to naturalistic images. Second, we demonstrate language-induced attribute modulation: later layers selectively amplify goal-relevant attributes in visual representations of objects. We demonstrate this phenomenon across a range of different prompts. Finally, we provide a causal intervention that demonstrates that attribute modulation mediates a VLM’s response distribution. Together, our results support a more dynamic account of cross-modality processing in VLMs — rather than vision tokens serving as static repositories of information, they are modulated to support queries articulated in language.
Anthology ID:
2026.emnlp-main.1819
Volume:
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
41458–41479
Language:
URL:
https://aclanthology.org/2026.emnlp-main.1819/
DOI:
Bibkey:
Cite (ACL):
Brian Song, Michael A. Lepori, and Ellie Pavlick. 2026. Linguistic Context Recodes Visual Representations in Vision-Language Models. In Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing, pages 41458–41479, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Linguistic Context Recodes Visual Representations in Vision-Language Models (Song et al., EMNLP 2026)
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PDF:
https://aclanthology.org/2026.emnlp-main.1819.pdf