The Linear Representation Hypothesis for Vision-Language-Action Models
The linear representation hypothesis (LRH) has become a standard lens for measuring and intervening on semantic information through the internal representations of large language models (LLMs). A growing body of work has begun extending this perspective to vision-language-action (VLA) models, but the dynamical nature of embodied interaction introduces an additional challenge. Unlike semantic attributes commonly studied in LLMs, such as gender or language, a physical quantity of interest (QoI) in a VLA evolves jointly with the system dynamics: the representation influences the actions selected by the policy, which alter the physical state and, in turn, the next representation. In this pape...
| Authors | Minseok Jeong, Hyewon Choi, Hiroyasu Tsukamoto et al. |
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| Primary category | cs.LG |
| Published | 25 September 2026 |
| Last updated at source | 4 October 2026 |
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