Author

D. Prasad

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Preprint Sep 2026

Does Video Memory Use What It Retrieves? A Causal Audit of Memory Specificity

Video models increasingly use memory to preserve information over long sequences, with the assumption that gains come from retrieving and using the correct past content. Standard memory ablations test whether memory helps, but not whether the retrieved content is responsible. We test this directly with read-time memory...

Aditi Tiwari, Akshit Bhalla, D. Prasad et al. · 0 citations

Preprint Aug 2026

Inference-Time Attention Steering for Vision-Language-Action Driving Models

Vision-language-action (VLA) driving models couple a reasoning stage with a diffusion-based trajectory decoder, but do not give a direct way to redirect attention toward safety-critical actors at inference time without retraining. We studied a bounded additive pre-softmax attention bias on the visual tokens of detector...

D. Prasad, Lars Ullrich, Knut Graichen · 1 citation