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Sparsity-Guided Holistic Explanation for LLMs with Interpretable Inference-Time Intervention (2312.15033v1)

Published 22 Dec 2023 in cs.CL and cs.AI

Abstract: LLMs have achieved unprecedented breakthroughs in various natural language processing domains. However, the enigmatic ``black-box'' nature of LLMs remains a significant challenge for interpretability, hampering transparent and accountable applications. While past approaches, such as attention visualization, pivotal subnetwork extraction, and concept-based analyses, offer some insight, they often focus on either local or global explanations within a single dimension, occasionally falling short in providing comprehensive clarity. In response, we propose a novel methodology anchored in sparsity-guided techniques, aiming to provide a holistic interpretation of LLMs. Our framework, termed SparseCBM, innovatively integrates sparsity to elucidate three intertwined layers of interpretation: input, subnetwork, and concept levels. In addition, the newly introduced dimension of interpretable inference-time intervention facilitates dynamic adjustments to the model during deployment. Through rigorous empirical evaluations on real-world datasets, we demonstrate that SparseCBM delivers a profound understanding of LLM behaviors, setting it apart in both interpreting and ameliorating model inaccuracies. Codes are provided in supplements.

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Authors (4)
  1. Zhen Tan (68 papers)
  2. Tianlong Chen (202 papers)
  3. Zhenyu Zhang (250 papers)
  4. Huan Liu (283 papers)
Citations (12)
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