Slow to See, Slow to Suppress: Understanding the Effects of Modality in Context-Memory Conflicts

Athulith Paraselli, Tianze Hua, Ellie Pavlick


Abstract
We investigate how vision-language models (VLMs) handle context-memory conflicts; that is, situations in which the model is given information in context that differs from what was stored parametrically during training. We document asymmetric biases: models tend to prefer in-context information about entities which appear in text, but prefer parametric information about entities which appear in images. We relate this asymmetry to the late representational alignment across modalities, showing that the longer processing time associated with resolving visual entities prevents the suppression of the model’s usual factual recall mechanism, thus resulting in more parametric answers. Chain-of-thought reasoning does not appear to resolve the gap, but increasing the amount of visual information in the context does show an effect. These results illustrate the complexity of ensuring consistent behavior as models become increasingly multimodal and retrieval-augmented.
Anthology ID:
2026.findings-emnlp.557
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2026
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
Findings
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
11751–11778
Language:
URL:
https://aclanthology.org/2026.findings-emnlp.557/
DOI:
Bibkey:
Cite (ACL):
Athulith Paraselli, Tianze Hua, and Ellie Pavlick. 2026. Slow to See, Slow to Suppress: Understanding the Effects of Modality in Context-Memory Conflicts. In Findings of the Association for Computational Linguistics: EMNLP 2026, pages 11751–11778, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Slow to See, Slow to Suppress: Understanding the Effects of Modality in Context-Memory Conflicts (Paraselli et al., Findings 2026)
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PDF:
https://aclanthology.org/2026.findings-emnlp.557.pdf