This text discusses the problematic behaviors exhibited by language models (LMs) and proposes strategies to enhance their robustness. It emphasizes automated adversarial testing techniques to identify vulnerabilities and elicit undesirable behaviors. Researchers at Eleuther AI focus on identifying well-formed language prompts to elicit arbitrary behaviors while maintaining naturalness. They introduce reverse language modeling to optimize LM responses.
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Enhancing Language Model Robustness
Challenges and Solutions
Language models (LMs) can exhibit problematic behaviors like producing toxic responses or getting sidetracked by irrelevant text. To address this, one strategy involves employing techniques that automate adversarial testing and identifying vulnerabilities without human intervention.
Automated Adversarial Testing
Existing methods can automatically expose flaws in LMs, but they often produce grammatically incorrect or nonsensical strings. To improve this, researchers at Eleuther AI focused on identifying well-formed, natural language prompts to elicit arbitrary behaviors from pre-trained LMs.
Optimization Approach
Researchers framed the process as an optimization problem, aiming to identify a sequence of tokens that maximizes the probability of generating a desired continuation while maintaining text naturalness. They introduced naturalness as a side constraint to ensure that the generated inputs resemble those written by humans.
Reverse Language Modeling
To address the problem, researchers involved a reverse language modeling model and pre-trained it on tokens in reversed order. They conducted behavioral elicitation by sampling multiple trajectories from the reverse LM, inputting these trajectories into the forward LM, and selecting the prefix trajectory that maximizes the probability of generating the target suffix.
For more details, check out the Paper.
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