Verifier Strictness Controlled via Hidden-State Steering
A recent study published on arXiv (2605.20745) indicates that generative verifiers used for step-wise verification demonstrate inadequate calibration in their strictness, often being too lenient or overly stringent. The researchers identified a hidden-state signal related to verification that appears near paragraph boundaries, reflecting tendencies for acceptance or rejection. Utilizing this signal allows for hidden-state steering to adjust the strictness of verifiers without the need for fine-tuning. Nonetheless, uniform steering presents a dilemma between detecting errors and certifying correctness. To overcome this issue, the authors introduce VerifySteer, a technique that harnesses latent correctness information to enhance verification outcomes.
Key facts
- arXiv paper 2605.20745
- Focus on step-wise verification
- Verifier strictness is poorly calibrated
- Hidden-state signal found near verification paragraph boundaries
- Steering modulates strictness without fine-tuning
- Uniform steering causes trade-off between error detection and certification
- VerifySteer proposed to exploit latent correctness
- Published on arXiv
Entities
Institutions
- arXiv