When Visuals Aren't the Problem: Evaluating Vision-Language Models on Misleading Data Visualizations

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Main Authors: Lalai, Harsh Nishant, Shah, Raj Sanjay, Pfister, Hanspeter, Varma, Sashank, Guo, Grace
Format: Preprint
Published: 2026
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author Lalai, Harsh Nishant
Shah, Raj Sanjay
Pfister, Hanspeter
Varma, Sashank
Guo, Grace
author_facet Lalai, Harsh Nishant
Shah, Raj Sanjay
Pfister, Hanspeter
Varma, Sashank
Guo, Grace
contents Visualizations help communicate data insights, but deceptive data representations can distort their interpretation and propagate misinformation. While recent Vision Language Models (VLMs) perform well on many chart understanding tasks, their ability to detect misleading visualizations, especially when deception arises from subtle reasoning errors in captions, remains poorly understood. Here, we evaluate VLMs on misleading visualization-caption pairs grounded in a fine-grained taxonomy of reasoning errors (e.g., Cherry-picking, Causal inference) and visualization design errors (e.g., Truncated axis, Dual axis, inappropriate encodings). To this end, we develop a benchmark that combines real-world visualization with human-authored, curated misleading captions designed to elicit specific reasoning and visualization error types, enabling controlled analysis across error categories and modalities of misleadingness. Evaluating many commercial and open-source VLMs, we find that models detect visual design errors substantially more reliably than reasoning-based misinformation, and frequently misclassify non-misleading visualizations as deceptive. Overall, our work fills a gap between coarse detection of misleading content and the attribution of the specific reasoning or visualization errors that give rise to it.
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id arxiv_https___arxiv_org_abs_2603_22368
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publishDate 2026
record_format arxiv
spellingShingle When Visuals Aren't the Problem: Evaluating Vision-Language Models on Misleading Data Visualizations
Lalai, Harsh Nishant
Shah, Raj Sanjay
Pfister, Hanspeter
Varma, Sashank
Guo, Grace
Computer Vision and Pattern Recognition
Artificial Intelligence
Visualizations help communicate data insights, but deceptive data representations can distort their interpretation and propagate misinformation. While recent Vision Language Models (VLMs) perform well on many chart understanding tasks, their ability to detect misleading visualizations, especially when deception arises from subtle reasoning errors in captions, remains poorly understood. Here, we evaluate VLMs on misleading visualization-caption pairs grounded in a fine-grained taxonomy of reasoning errors (e.g., Cherry-picking, Causal inference) and visualization design errors (e.g., Truncated axis, Dual axis, inappropriate encodings). To this end, we develop a benchmark that combines real-world visualization with human-authored, curated misleading captions designed to elicit specific reasoning and visualization error types, enabling controlled analysis across error categories and modalities of misleadingness. Evaluating many commercial and open-source VLMs, we find that models detect visual design errors substantially more reliably than reasoning-based misinformation, and frequently misclassify non-misleading visualizations as deceptive. Overall, our work fills a gap between coarse detection of misleading content and the attribution of the specific reasoning or visualization errors that give rise to it.
title When Visuals Aren't the Problem: Evaluating Vision-Language Models on Misleading Data Visualizations
topic Computer Vision and Pattern Recognition
Artificial Intelligence
url https://arxiv.org/abs/2603.22368