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#artificial intelligence Preprint Sep 2026

VEX-Bench: Benchmarking Verification Complexity of LLM-Generated Misinformation

Large language models (LLMs) have made misinformation inexpensive to produce but not to verify, creating a growing asymmetry in the information ecosystem. Under tight time, labor, and budget constraints, media organizations, platforms, and fact-checkers rely on screening to prioritize which content to verify. We introd...

Hanxun Huang, Yu-Tao Wu, Qi-Zhou Wang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

LAYERSCOPE: A Layerwise Characterization of Video and Multimodal Learned Representations

We propose LAYERSCOPE, a label-free, layerwise framework that aims to characterize a model's learned representations in video and multimodal settings. Evaluating downstream performance using representations from final or intermediate layers typically requires large amounts of labeled data, repeated task-specific evalua...

Sandra Arcos-Holzinger, Debashish Chakraborty, Rohita Mocharla et al. · 0 citations
Jul 2026

GeoDetect: Geometric Adversarial Detection for VLPs

Theoretical analysis shows that under this anisotropic structure, adversarial attacks increase the expected geometric separation between clean and adversarial examples (AEs), and proposes GeoDetect, which leverages these off-manifold deviations via geometric scores to identify AEs.

Afsaneh Hasanebrahimi, Hanxun Huang, Christopher Leckie et al. · 0 citations
#machine learning Preprint Aug 2026

VisER: Visual Evidence and Reliance for Object Hallucination Detection in LVLMs

VisER is proposed, a training-free two-sided metric for object-level hallucination detection that improves AUROC and AUPR over a range of baselines and measures whether object-context compatibility is backed by object-specific evidence from image tokens.

Afsaneh Hasanebrahimi, Hanxun Huang, Christopher Leckie et al. · 0 citations

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