Attribution Patching

Attribution patching is the approximate patching method that estimates intervention effects using gradient-based attribution rather than exhaustive full patches - it accelerates causal screening over large component spaces.

What Is Attribution patching?

• Definition: Uses local linear approximations to predict effect of replacing activations.
• Speed Benefit: Much faster than brute-force patching across many heads and positions.
• Use Case: Good for ranking candidate components before detailed causal validation.
• Approximation Limit: Accuracy depends on local linearity and may miss nonlinear interactions.

Why Attribution patching Matters

• Scalability: Enables broad interpretability scans on large models and long contexts.
• Prioritization: Helps focus expensive full interventions on most promising targets.
• Workflow Efficiency: Reduces compute cost in early mechanism discovery stages.
• Method Complement: Pairs well with exact patching for confirmatory analysis.
• Caution: Approximate rankings require validation before strong causal claims.

How It Is Used in Practice

• Two-Stage Workflow: Use attribution patching for triage, then exact patching for confirmation.
• Stability Checks: Compare ranking consistency across prompts and metric definitions.
• Error Analysis: Audit cases where approximate and exact effects disagree.

Attribution patching is a compute-efficient screening tool for causal interpretability workflows - attribution patching adds speed and scale when paired with rigorous follow-up validation.