arXiv Computation and Language By Donghao Zeng (Mila, McGill University), Nishant Subramani (Carnegie Mellon University), Tamar Rott Shaham (MIT CSAIL), Benno Krojer (Mila, McGill University, Northeastern University)

Cross-modal Steering Vectors Exist Across Both Image and Text Generation

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The paper investigates whether steering vectors—specific vectors that influence generation—can transfer across modalities in unified multimodal models. By demonstrating that vectors that steer text generation can also steer image generation (and vice versa) for concepts like emotion and object size, the authors show that these vectors have a consistent, interpretable effect even for modality‑specific concepts. The study reveals a geometric signature: highly transferable steering vectors point in similar directions across the modality gap, suggesting shared underlying mechanisms.

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